Selling on Amazon India scales your business fast, but it also complicates your tax compliance. Unlike traditional retail, e-commerce GST requires reconciling thousands of micro-transactions, tracking platform deductions, and handling high return rates.
If you get your GSTR-1 wrong, the tax department’s automated systems will flag the mismatch between your declared sales and Amazon's TCS (Tax Collected at Source) reports, leading straight to scrutiny notices.
Here is the exact, step-by-step process to accurately file your GSTR-1 as an Amazon seller in 2026, complete with the latest portal updates.
1. The Baseline: E-Commerce GST Rules
For physical brick-and-mortar stores, GST registration is only mandatory after crossing a ₹40 lakh turnover threshold. For Amazon sellers, this exemption does not exist. Under Section 24(ix) of the CGST Act, if you supply taxable goods through an E-Commerce Operator (ECO), you must have a GSTIN from day one. Additionally, Amazon is legally required to deduct 1% TCS on your net taxable sales before remitting your payouts.
2. Download Your Merchant Tax Report (MTR)
You cannot file an accurate GST return using your bank settlement statements. You need the raw transaction data.
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Log in to Amazon Seller Central.
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Go to Reports > Tax Document Library > Merchant Tax Reports.
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Download both your B2B and B2C CSV files for the month.
These reports contain the invoice numbers, Place of Supply (the delivery state), HSN codes, tax rates, and crucial data on canceled or returned orders.
3. Step-by-Step GSTR-1 Filing on the Portal
Log into the GST portal (gst.gov.in), navigate to your Returns Dashboard, select the month, and click Prepare Online under GSTR-1.
Here is where your Amazon data must go:
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Table 4 (B2B Invoices): If you are enrolled in Amazon Business, enter the invoice-wise details of sales made to registered businesses here. You need the buyer's GSTIN and the exact tax breakdown so they can claim Input Tax Credit (ITC).
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Table 7 (B2C Others): This holds the majority of your retail sales. Consolidate your MTR data by Place of Supply (State) and GST Rate. For example, make a single entry for all 18% GST products shipped to Karnataka, entering the total taxable value. The portal will auto-calculate the IGST.
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Table 9B (Credit Notes): E-commerce has high return rates. If a customer returns a product sold in a previous month, issue a Credit Note here. If you report gross dispatched orders instead of factoring in returns, you will pay tax on unsold inventory out of your own pocket.
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Table 12 (HSN Summary): Provide a summary of the total quantity, taxable value, and tax collected against each product's HSN code.
4. The Critical Step: Table 14 (ECO Reporting)
Introduced to strictly monitor online sales, Table 14 is the most important section for Amazon sellers.
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Navigate to Table 14(a) – Liable to collect tax u/s 52 (TCS).
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Enter Amazon's state-wise ECO GSTINs.
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Declare the net taxable value of all supplies made through Amazon.
The data you enter here is cross-referenced by the government with the TCS returns Amazon files (GSTR-8). If your Table 14 matches Amazon’s reported data, you can seamlessly claim that 1% TCS back into your electronic cash ledger. If it doesn't match, your money gets stuck.
The Cost of Manual Filing (And How to Fix It)
Sorting thousands of rows in an Amazon MTR Excel sheet by state, tax rate, and deducting returns is a massive time sink. One wrong formula or misplaced decimal point triggers a mismatch between your GSTR-1, GSTR-3B, and Amazon's TCS report. This leads directly to automated compliance notices (Form ASMT-10) and heavy interest penalties.
As your order volume grows, manual Excel accounting becomes a liability.
This is why top Amazon sellers use automated platforms like OkayGST. Instead of wrestling with spreadsheets, OkayGST is built to handle marketplace complexities directly.
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Zero Formatting Needed: Simply upload your raw Amazon MTR files. The software automatically categorizes your B2B, B2C, and return transactions.
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Flawless Table 14 Compliance: OkayGST inherently understands the e-commerce reporting rules, automatically mapping your sales to Amazon's exact ECO GSTINs so your TCS credits are never blocked.
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Notice Prevention: It cross-verifies your data before generation, catching mismatches instantly and creating a ready-to-upload JSON file in minutes.
Filing your GSTR-1 doesn't have to be a monthly crisis. By keeping your data clean, understanding the portal's e-commerce tables, and leveraging smart automation with OkayGST, you can protect your margins and spend your time actually growing your Amazon business.
