GSTR-1 Generator for Amazon Sellers — MTR to JSON & Excel

About

Stop hand-keying your Amazon GST data into the portal.

GSTR-1 Generator for Amazon Sellers converts your Amazon India MTR (Merchant Tax
Report) — both the B2B and B2C exports — into a GST-portal-ready GSTR-1 JSON file and a
clean, human-readable Excel workbook. Everything runs locally in your browser: your
sales data is never uploaded, stored on a server, or shared.

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WHAT IT DOES
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• Reads your Amazon MTR-B2B and MTR-B2C CSV files
• Builds a GSTR-1 JSON (schema GST3.2.4) ready for the GST Returns Offline Tool
• Builds an Excel workbook with a totals summary + per-section sheets
• Auto-classifies every line into the right GSTR-1 table:
   – B2B (Table 4)
   – B2CL (Table 5)
   – B2CS (Table 7)
   – HSN summary (Table 12)
   – E-commerce / TCS (Table 14)
• Splits CGST/SGST vs IGST automatically from seller state and place of supply
• On-screen section totals so you can review before you file
• Flags rows it can’t process instead of silently dropping them

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PRIVATE BY DESIGN
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• 100% local processing — your tax data never leaves your browser
• No account, no sign-up, no analytics, no tracking
• Files are read in-memory and converted on your device

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HOW TO USE
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1. Download your MTR-B2B and/or MTR-B2C report from Amazon Seller Central
2. Open the extension, enter your Seller GSTIN and return period (MMYYYY)
3. Drop in your CSV file(s) and click Generate
4. Review the on-screen totals
5. Download the GSTR-1 JSON and/or Excel

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WHO IT’S FOR
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Amazon India sellers and their accountants who want to prepare GSTR-1 from Amazon’s MTR
report quickly and accurately — without copying numbers by hand.

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PRO (optional upgrade)        ⟵ include this block ONLY in the Gumroad build
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Pro adds Multi-GSTIN Profiles — save unlimited businesses (GSTIN, state, ECO GSTIN) and
switch between them in one click. Ideal for accountants and multi-entity sellers. The
free version saves one profile. Pro is a one-time/annual license sold via Gumroad; only
your license key is sent to Gumroad to verify it — never your tax data.

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IMPORTANT
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This tool helps you PREPARE your GSTR-1. Always review every figure before filing. It is
not tax advice and it does not file returns for you. Verify the output against your own
records and the GST portal before submission.

Not affiliated with or endorsed by Amazon or GSTN.

Support / feedback: [email protected]