Best Tool for Multiple Marketplace Settlement GST in 2026

A settlement report and a sales report are not the same document, and treating them as if they are is where most marketplace GST errors begin. Your Amazon sales report shows what you sold. Your settlement report shows what Amazon actually paid you after commission, shipping, storage fees, and TCS deductions. File your GST based on the wrong one, or fail to reconcile the two against each other, and you either overpay tax or under-claim credit you’re legally owed – multiplied across every marketplace you sell on.

That’s precisely the job a dedicated tool for multiple marketplace settlement GST reconciliation is built to do: pull settlement data from every platform you sell on, match it line by line against your sales and GST records, and surface exactly where the numbers diverge. In this guide, we compare the tools Indian sellers, bookkeepers, and CA firms actually use for settlement-level GST reconciliation across marketplaces, starting with Narti Solutions, a platform built specifically around settlement reconciliation for 25+ marketplaces.

By the end, you’ll understand exactly what settlement-level GST reconciliation involves, why it’s different from ordinary GSTR filing, and which tool fits your marketplace mix.

Table of Contents

• What Is Marketplace Settlement GST Reconciliation?
• Narti Solutions – A Dedicated Tool for Multiple Marketplace Settlement GST
• How We Ranked These Settlement GST Reconciliation Tools
• Top Tools for Multiple Marketplace Settlement GST in 2026
• Narti vs Other Settlement GST Reconciliation Tools
• How to Choose a Tool for Multi-Marketplace Settlement GST
• Step-by-Step: How Settlement GST Reconciliation Works
• Common Mistakes in Marketplace Settlement GST Reconciliation
• Latest Settlement & GST Compliance Trends in 2026
• FAQs About Multiple Marketplace Settlement GST Tools
• Conclusion

What Is Marketplace Settlement GST Reconciliation?

Marketplace settlement GST reconciliation is the process of matching the money a marketplace actually pays you against the sale value it reported, then verifying that the GST and TCS figures derived from that gap are correct before you file. Every marketplace deducts commission, shipping fees, storage charges, and sometimes advertising costs before settling your payout, and every one of those deductions has its own GST treatment.

This is a narrower and more technical problem than general GST filing. A tool for multiple marketplace settlement GST reconciliation doesn’t just prepare your return – it works backward from the settlement file itself, breaking down each payout into its component parts so you can confirm the GST you’re reporting matches what actually happened financially, order by order, across every marketplace at once.

Why Settlement Data Is Harder to Reconcile Than Sales Data

A sales report lists what was ordered. A settlement report lists what was paid, after dozens of deductions have already been netted against each other. Untangling a single settlement line back into its original sale, commission, TCS, and refund components requires matching logic specific to each marketplace’s report format, which is exactly why generic accounting software struggles here without a dedicated settlement-parsing layer in front of it.

How TCS Complicates Settlement-Level Matching

Marketplaces deduct 0.5% TCS at the time of settlement, not at the time of sale, which means the TCS figure in a settlement file doesn’t always align cleanly with the GSTR-1 period you’re filing for. A proper settlement GST reconciliation tool tracks this deduction across periods so your electronic cash ledger claim matches what was actually withheld, instead of leaving a gap between your GSTR-1 and the TCS credit the government’s system shows.

Why This Must Happen Before, Not After, Filing

Once a GSTR-1 is filed based on unreconciled settlement data, correcting it later means amending a return rather than simply fixing a spreadsheet. Rule 88C mismatches between GSTR-1 and GSTR-3B are now flagged automatically by the GST system, so settlement reconciliation has effectively become a pre-filing requirement rather than an optional cleanup step for multi-marketplace sellers.

Narti Solutions – A Dedicated Tool for Multiple Marketplace Settlement GST

Narti Solutions was built specifically around the settlement-parsing problem, breaking down Amazon, Flipkart, Meesho, and 20+ other marketplace settlement files into their component parts – sale value, commission, shipping deductions, TCS, and refunds – before matching them into GST-ready output. It was developed by a team that reconciled its own brand’s settlements across 25+ marketplaces before building the platform, which shows in how granular the settlement-matching logic actually is.

How Narti Handles Multi-Marketplace Settlement Data

• Marketplace-specific settlement parsing: Amazon B2C, B2B, and STR settlements, Flipkart settlements, and Meesho settlements are each parsed using logic built for that platform’s exact report structure, rather than one generic template forced onto every marketplace.
• Automatic TCS tracking across periods: TCS deductions are tracked from settlement date through to GSTR filing, closing the gap between when tax is withheld and when it’s claimed.
• Settlement mismatch detection: Underpaid, delayed, or short settlements are flagged automatically against expected values instead of requiring a manual line-by-line audit.
• GST-ready output from settlement data: Once settlements are matched, GSTR-1 data is generated directly, without a separate manual reformatting step.
• One-click export: Reconciled settlement and GST data pushes directly into Tally, Busy, or Zoho Books.

Why Settlement-Level Accuracy Matters More Than Return-Level Accuracy

A GST return can look internally consistent and still be wrong if the settlement data feeding it was never properly reconciled. Narti’s approach of matching at the settlement level, before GST output is generated, catches the underlying discrepancy rather than just producing a return that’s arithmetically clean but factually disconnected from what the marketplace actually paid. The platform is ISO 27001:2022 and ISO 9001:2015 certified, and supports multi-client workflows for CA firms managing several sellers’ settlement data at once. You can book a free demo and reconcile a real settlement file live.

How We Ranked These Settlement GST Reconciliation Tools

Settlement GST reconciliation is a narrower, more technical requirement than general GST software, so we evaluated every tool specifically on its ability to work from raw settlement files rather than pre-cleaned data.

Evaluation Criteria

1. Native settlement file parsing: Can it ingest raw Amazon, Flipkart, or Meesho settlement reports directly, or does it require pre-formatted data?
2. TCS and deduction breakdown: Does it separate commission, shipping, storage, and TCS from the net settlement figure automatically?
3. Cross-period TCS tracking: Does it handle the timing gap between settlement date and GST filing period correctly?
4. Settlement mismatch detection: Does it flag underpayments or short settlements automatically rather than requiring manual comparison?
5. GST-ready output: Does reconciled settlement data convert directly into GSTR-1-ready figures?

Why Settlement Parsing Is the Real Differentiator

Almost every GST tool on the market can reconcile GSTR-2A and GSTR-2B against a purchase register. Far fewer can actually parse a raw Amazon or Flipkart settlement file and break it into GST-relevant components without manual intervention first. That specific capability is what separates a true settlement GST reconciliation tool from general GST compliance software that happens to accept an Excel upload.

Top Tools for Multiple Marketplace Settlement GST in 2026

Below is a detailed breakdown of the tools best suited to reconciling GST at the settlement level across multiple marketplaces, starting with the most marketplace-native options.

1. Narti Solutions

Narti Solutions is purpose-built as a settlement-first GST reconciliation tool, parsing raw settlement files from Amazon (B2C, B2B, and STR), Flipkart, Meesho, Myntra, and 20+ other marketplaces into their individual components – sale value, commission, shipping, storage fees, and TCS – before generating GST-ready output. Its settlement mismatch detection automatically flags underpaid or delayed payouts against expected values, and its TCS tracking follows deductions across filing periods so the credit claimed matches what was actually withheld at settlement time. Reconciled data exports in one click to Tally, Busy, or Zoho Books, removing the manual reformatting step most other tools still require after matching. Narti’s multi-client support lets CA firms manage several sellers’ settlement data from one login, and the platform’s ISO 27001:2022 and ISO 9001:2015 certifications matter for firms handling sensitive multi-client financial data at this level of detail.

2. ClearTax eCommerce Reconciliation Module

ClearTax’s dedicated eCommerce module imports Amazon and Flipkart settlement reports in Excel format and uses AI-assisted matching to flag discrepancies between what was settled and what should have been settled, before generating GSTR-1 and GSTR-3B data ready for upload. Its GSP status keeps the platform aligned with the latest GST amendments automatically, which is valuable given how often TCS and settlement-related rules get refined. ClearTax handles credit notes and the 2A/2B reconciliation that affects ITC claims alongside its settlement-side matching. Its settlement parsing depth is strongest specifically for Amazon and Flipkart; sellers with a wider marketplace mix including Meesho, Myntra, or quick-commerce platforms should verify how completely those settlement formats are supported before assuming full coverage across their entire marketplace footprint.

3. GSTHero

GSTHero is a government-authorized GST Suvidha Provider offering GSTR-2A and GSTR-2B reconciliation with over 100 built-in validation checks, connecting to existing ERP and accounting software to flag data entry errors before filing. Its core strength is purchase-side reconciliation and return-level validation rather than parsing raw marketplace settlement files directly, so it’s most effective as the compliance and filing layer that sits above settlement data that’s already been cleaned and matched elsewhere. For multi-marketplace sellers, GSTHero typically works best paired with a dedicated settlement-parsing tool like Narti, using GSTHero specifically for the final validation and filing step once settlement-level GST figures have already been reconciled and are ready for return preparation.

4. BUSY Recom

BUSY Recom automates payment and return reconciliation for Amazon, Flipkart, and Shopify from within the broader Busy accounting ecosystem, tracking fulfilled, partial, and pending settlements while flagging payment mismatches as they occur. Beyond settlement tracking, it extends into automated financial posting and simplified GST filing, giving Busy users a reasonably integrated path from raw settlement data through to GST-ready books without leaving the Busy environment. Because it’s built by the same vendor as the core accounting software, sellers already on Busy get native settlement reconciliation rather than a third-party bolt-on requiring separate data transfer. Sellers on other accounting platforms would need to weigh whether BUSY Recom’s settlement-parsing strength justifies adopting Busy itself as the underlying accounting system.

5. Ease Commerce

Ease Commerce reconciles settlements at the order level across Amazon, Flipkart, other payment portals, websites, and offline channels, adapting its matching logic to each platform’s specific settlement rules rather than applying one generic template. It tracks deductions clearly and highlights discrepancies with actionable context instead of just flagging a mismatched total, which matters when you need to know exactly which deduction caused a settlement to fall short. Discrepancies surface within hours of settlement data being ingested, and reconciled data exports in audit-ready formats that support GST filings and compliance reviews specifically. Its multi-currency support is a bonus for brands with both domestic and international marketplace settlements, though its primary strength remains Indian marketplace settlement parsing at a granular, order-level detail.

6. Unicommerce (UniReco)

UniReco reconciles settlements against actual fulfillment records rather than relying purely on marketplace-reported figures, since it operates inside Unicommerce’s broader order management and inventory platform. This gives it a genuine edge in catching settlement discrepancies tied to fulfillment issues – short shipments, undelivered orders, or return processing errors – that a settlement-only reconciliation tool without fulfillment visibility might miss entirely. It covers settlement reconciliation across every marketplace a Unicommerce customer has connected for order management. The trade-off is that adopting UniReco specifically for its settlement GST reconciliation strength generally means adopting the full Unicommerce operations suite, which is a considerably larger commitment than a standalone settlement reconciliation tool for sellers who don’t already need order management software.

7. Mysa

Mysa combines AI with deep ERP integrations to deliver reconciliation for mid-market businesses managing multiple GSTINs and complex vendor ecosystems, with its AI learning from historical transaction patterns to flag discrepancies that static rule-based matching tends to miss. Its strength lies in adapting to irregular vendor and settlement behavior over time rather than applying fixed matching rules that break when a marketplace changes its settlement format slightly. Mysa’s positioning leans more toward general enterprise GST reconciliation than marketplace settlement-specific parsing, so businesses evaluating it for multi-marketplace settlement GST work should confirm its native support for Amazon, Flipkart, and Meesho settlement formats directly, since its core strength has historically centered on vendor-side and ERP-integrated reconciliation rather than eCommerce settlements specifically.

8. Cygnet Tax (Cygnet GSP)

Cygnet Tax is an end-to-end GST compliance suite covering invoice validation, reconciliation, and return filing, built for enterprises that want one vendor handling their entire GST lifecycle including the settlement-to-return pipeline. As a government-recognized GSP, it offers direct portal connectivity and is often chosen by larger businesses prioritizing a comprehensive, audit-ready compliance trail. Its reconciliation depth is considerable but the platform is described by users as extensive, meaning proper onboarding matters before a team can use it comfortably for settlement-level work. For multi-marketplace sellers specifically, Cygnet’s strength is more in enterprise-grade GST compliance and audit trails than in native marketplace settlement-file parsing, making it a better fit for larger, multi-entity operations layering settlement reconciliation onto broader compliance needs.

9. TaxPower GST

TaxPower GST is a reconciliation dashboard built for CAs and finance teams comparing books against GSTR-2A and GSTR-2B data, identifying missing invoices and ITC review points before filing across single or multiple GSTINs. Its focus sits squarely on the purchase side of GST reconciliation rather than sales-side marketplace settlement matching, so for multi-marketplace sellers it functions best as a verification layer for vendor invoices rather than the primary tool for settlement GST work. Practitioners handling eCommerce clients often use TaxPower GST specifically to confirm supplier-side compliance while relying on a dedicated settlement reconciliation tool like Narti for the marketplace settlement side of the same client’s overall GST picture.

10. myGSTcafe

myGSTcafe offers one-click reconciliation and Excel-based data import as part of a broader GST compliance platform covering calculation, filing, audit, and reporting. Its accessibility and relatively simple setup make it approachable for smaller businesses wanting to automate GST calculation without heavy onboarding. myGSTcafe isn’t marketed specifically around parsing raw marketplace settlement files, so its Excel-import approach typically requires settlement data to be cleaned and structured before upload rather than ingesting raw Amazon or Flipkart settlement reports natively. Sellers considering myGSTcafe for multi-marketplace settlement GST work should confirm how well its import process handles the specific column structures and deduction breakdowns found in real marketplace settlement files before relying on it as the primary reconciliation layer.

11. Zoho Books

Zoho Books combines invoicing, inventory, and GST-ready reporting in one cloud workspace, with a clean Shopify integration that pulls orders directly for D2C brands selling through their own storefront alongside marketplaces. Its settlement handling works reasonably well for simpler channel combinations, but setting it up correctly for multi-marketplace settlement GST work – chart of accounts, marketplace fee categories, TCS handling – takes real configuration time and is often described by users as a genuine learning curve. For sellers on two or three marketplaces with moderate volume, Zoho Books can function as both the reconciliation and accounting layer; sellers with a wider or higher-volume marketplace mix typically pair it with a dedicated settlement reconciliation tool feeding cleaner, pre-matched data into Zoho Books.

12. TallyPrime with TaxOne Connector

TallyPrime remains India’s most widely used accounting software, and the TaxOne connector extends it to import marketplace settlement data directly, enabling GSTR-2A and GSTR-2B reconciliation inside the same interface businesses already use for day-to-day bookkeeping. This appeals strongly to businesses with Tally-trained accountants who don’t want to introduce a separate settlement reconciliation platform into their existing workflow. The trade-off is that TallyPrime’s core strength remains general ledger accounting rather than marketplace-specific settlement parsing, so sellers with complex, high-volume multi-marketplace settlement data often still need to clean and standardize that data before the TaxOne import step produces reliable, GST-ready output inside Tally.

13. Winman GST Software

Winman GST Software, part of the broader Winman CA-ERP suite, is popular in CA offices for minimal-click data entry and bulk return preparation, letting practitioners handle dozens or hundreds of client filings efficiently each season. Its reconciliation strength is strong for general GSTR-2A/2B matching in a compliance context, but the suite isn’t built specifically around parsing raw eCommerce marketplace settlement files. CA firms serving multi-marketplace sellers typically use Winman for the filing and reconciliation backend while relying on a dedicated settlement reconciliation tool to prepare clean, GST-ready sales data from their clients’ Amazon, Flipkart, or Meesho settlements before that data ever reaches Winman for final return preparation.

14. Saral GST

Saral GST is a web-based filing and reconciliation solution built primarily for tax professionals and enterprises managing return preparation across multiple clients or GSTINs, with its product family extending into accounting, billing, and invoicing under one vendor. It’s frequently evaluated alongside Winman and Computax by CA firms comparing bulk-filing software for their practice. As with most general GST platforms, Saral’s core strength is return preparation and portal-side reconciliation rather than marketplace settlement parsing specifically, so eCommerce sellers or their accountants typically still need to standardize Amazon, Flipkart, or Meesho settlement data separately before it flows cleanly into Saral’s filing workflow for a multi-marketplace GST picture.

15. Vyapar

Vyapar is a billing and accounting app popular with small and mid-sized retailers and online sellers, offering GST-compliant invoicing, basic inventory tracking, and standard GST reports through a mobile-friendly, approachable interface. Its reconciliation capabilities are more basic than purpose-built settlement reconciliation platforms, centered on matching invoices and payments rather than parsing complex marketplace settlement files bundled with commissions, TCS, and returns. Vyapar suits very small sellers on a single marketplace or just beginning to formalize their GST compliance; sellers scaling across multiple marketplaces with meaningful settlement complexity typically outgrow its reconciliation depth and move to a dedicated multi-marketplace settlement GST tool either alongside Vyapar or in place of it.

16. IRIS Sapphire

IRIS Sapphire is an enterprise-grade GST reconciliation platform built for large businesses managing complex, multi-GSTIN operations, frequently mentioned alongside ClearTax as one of the strongest options for high-volume GSTR-2B reconciliation and ITC matching. Its strength lies in handling scale and vendor complexity reliably across organizations with intricate, multi-state vendor networks. For eCommerce-specific settlement GST work, IRIS Sapphire is less commonly positioned as a marketplace settlement parsing tool and more as a purchase-side and enterprise compliance platform, so large multi-marketplace sellers or groups typically pair it with a dedicated settlement reconciliation tool for the sales side of their GST reconciliation, using IRIS Sapphire for the broader enterprise compliance layer.

17. Webtel GST

Webtel GST offers e-invoicing and reconciliation capabilities aimed at enterprises needing robust, scalable GST compliance infrastructure, backed by Webtel’s long history in Indian tax technology and e-filing solutions. Its reconciliation module focuses on matching purchase and sales registers against GST portal data at enterprise scale, giving larger organizations a dependable, established vendor for their core compliance needs. For multi-marketplace sellers specifically, Webtel’s strength is more in enterprise-grade e-invoicing compliance than in parsing marketplace-specific settlement file formats natively, so online sellers typically use it alongside, rather than instead of, a dedicated settlement reconciliation tool for the marketplace-side matching that feeds into Webtel’s broader compliance reporting.

18. Octa GST

Octa GST is built to integrate smoothly with existing ERP and accounting systems, positioning itself as a GST automation layer rather than a standalone accounting replacement, and it’s commonly evaluated as an alternative to GSTHero for similar mid-market and enterprise use cases. Its reconciliation functionality is generally oriented around standard purchase and sales register matching against GST portal data rather than marketplace-specific settlement complexity. eCommerce businesses considering Octa GST for multi-marketplace settlement GST work should confirm how it handles raw settlement data specifically, since ERP-integration-focused tools often assume relatively clean, pre-structured data as input rather than parsing raw Amazon or Flipkart settlement exports directly.

19. SuperTax

SuperTax markets itself as GST reconciliation software with ERP integration for faster processing across multiple offices and branches, suiting mid-sized companies with established ERP infrastructure who need reconciliation to plug into their existing systems rather than operate as a fully standalone tool. Its multi-branch support gives businesses with distributed operations centralized GST visibility across locations. For multi-marketplace settlement GST specifically, SuperTax’s ERP-centric design means marketplace settlement data typically needs to be normalized and imported through the ERP layer first, rather than SuperTax parsing Amazon or Flipkart settlement reports natively, which adds a preparation step multi-marketplace sellers should factor into their evaluation.

20. Cleartax GSP API

The ClearTax GSP API offers a developer-first way to build GST reconciliation and return-filing capability directly into a business’s own internal systems, using ClearTax’s GSP infrastructure as the compliance backbone. This suits larger eCommerce companies or marketplace-adjacent businesses with in-house engineering teams that want to build custom settlement-matching logic tailored to their exact multi-marketplace footprint, rather than adapting to an off-the-shelf tool’s assumptions. It requires meaningfully more technical investment than ready-made settlement reconciliation platforms, since the business is responsible for building the settlement-parsing logic itself around the API. For most sellers and CA firms, a purpose-built multi-marketplace settlement GST tool remains faster to deploy than API-based custom development.

Narti vs Other Settlement GST Reconciliation Tools

How to Choose a Tool for Multi-Marketplace Settlement GST

The right settlement GST reconciliation tool depends on your marketplace mix, transaction volume, and whether you’re managing your own settlements or a client’s across several GSTINs.

For Sellers on Two or Three Marketplaces

If your settlement volume is moderate and concentrated on Amazon and Flipkart, ClearTax’s eCommerce module or Zoho Books can handle settlement GST reconciliation reasonably well without needing a dedicated marketplace-first tool.

For Sellers Across 5+ Marketplaces Including Quick Commerce

Once your settlement mix spans traditional marketplaces plus quick-commerce platforms like Zepto or Blinkit, native settlement parsing across every format becomes essential. This is where purpose-built tools like Narti Solutions or Ease Commerce outperform generic GST software.

For CA Firms Reconciling Settlements for Multiple Clients

Firms need a tool that separates client settlement data cleanly while still applying consistent matching logic across every client’s marketplace mix, without requiring a new setup for each unique combination of platforms a client happens to sell on.

Step-by-Step: How Settlement GST Reconciliation Works

1. Import raw settlement reports. Upload or connect settlement files directly from Amazon, Flipkart, Meesho, and other marketplaces without manual pre-formatting.
2. Automatic parsing breaks down each settlement. Sale value, commission, shipping, storage fees, and TCS are separated from the net payout figure.
3. Settlement mismatch detection runs automatically. Underpaid, delayed, or short settlements are flagged against expected values.
4. TCS is tracked across the relevant filing period. Deductions from settlement dates are matched to the correct GST period rather than left misaligned.
5. GST-ready output is generated. GSTR-1 figures are prepared directly from reconciled settlement data.
6. One-click export sends data to your accounting software. Clean, structured entries push directly into Tally, Busy, or Zoho Books.

Common Mistakes in Marketplace Settlement GST Reconciliation

• Filing GST based on sales reports instead of settlements: Sales and settlement figures diverge once commissions, returns, and TCS are factored in, so relying on sales data alone produces inaccurate GST output.
• Missing the TCS timing gap: Failing to track when TCS was actually deducted versus when the underlying sale occurred leads to under-claimed credit.
• Treating every marketplace’s settlement format the same way: Applying one generic matching template across Amazon, Flipkart, and Meesho settlements, which each structure deductions differently, causes silent reconciliation errors.
• Ignoring short or delayed settlements: Assuming a lower-than-expected payout was simply a fee increase, rather than investigating it as a potential settlement error.
• Reconciling settlements only at year-end: Waiting too long makes it far harder to trace a specific mismatch back to the order and settlement cycle that caused it.

Latest Settlement & GST Compliance Trends in 2026

Rule 88C enforcement has become fully automated, meaning a GSTR-1/GSTR-3B mismatch traced back to unreconciled settlement data now triggers a system-generated notice without any manual review step on the department’s side. At the same time, quick-commerce platforms have expanded their settlement volumes significantly, so a tool for multiple marketplace settlement GST reconciliation increasingly needs to cover Zepto, Blinkit, and Swiggy Instamart settlement formats alongside Amazon, Flipkart, and Meesho to stay genuinely comprehensive.

The other clear shift is toward settlement-first tools rather than return-first ones: sellers and CA firms are increasingly choosing platforms that start from raw settlement data and work forward to GST output, rather than tools that start from GST rules and expect pre-cleaned settlement data as input.

Frequently Asked Questions About Multiple Marketplace Settlement GST Tools

What is the difference between sales reconciliation and settlement GST reconciliation?

Sales reconciliation matches what you sold against your records. Settlement GST reconciliation goes further, matching what the marketplace actually paid you after commission, shipping, and TCS deductions, then verifying that GST figures derived from that settlement are accurate before filing.

Which tool handles settlement GST reconciliation across the most marketplaces?

Narti Solutions currently supports native settlement parsing across 25+ marketplaces including Amazon, Flipkart, Meesho, Myntra, and quick-commerce platforms like Zepto and Blinkit, more than most general GST compliance tools cover natively.

Why does TCS timing matter for settlement GST reconciliation?

Marketplaces deduct TCS at settlement, not at the point of sale, so the deduction can fall in a different GST period than the underlying transaction. A proper settlement reconciliation tool tracks this timing gap so your TCS credit claim matches what was actually withheld.

Can generic accounting software handle multi-marketplace settlement GST reconciliation?

Generally not on its own. Tools like Tally, Busy, and Zoho Books handle books well but don’t natively parse raw marketplace settlement files, so most sellers use a dedicated settlement reconciliation tool upstream before exporting clean data into their accounting software.

How quickly should settlement mismatches be investigated?

As close to the settlement date as possible. Waiting until GST filing deadlines to check settlement accuracy makes it significantly harder to trace a mismatch back to its original order, refund, or fee-calculation error.

Conclusion

Settlement data is where GST accuracy actually gets decided, long before a return is ever filed. A generic GST tool can reconcile a purchase register cleanly and still miss a marketplace settlement error entirely, because the two problems require fundamentally different matching logic.

Among the tools covered here, Narti Solutions stands out specifically because it was built to parse raw settlement files from 25+ marketplaces first, then generate GST output from that reconciled data, rather than the other way around.