The Invoice Management System puts every supplier invoice in front of you before GSTR-2B is even generated, and it expects a decision on each one. Here is what accept, reject and pending actually do, what happens if you do nothing, and a monthly workflow that keeps ITC clean without last-minute scrambling.
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An IRN can be cancelled on the Invoice Registration Portal within 24 hours of generation. Miss that window and the e-invoice stands, correctable only by a credit note or debit note. Here is what starts the clock, what to check before you cancel, and what changes once you can no longer undo it.
An e-way bill's validity is fixed the moment Part B is filled, and it does not pause for a breakdown, a diversion or a delay at a checkpost. Here is the window in which you can extend it, who is allowed to, and what happens if that window closes.
BigShip and Shipkloud pick the courier and print the label, but the e-way bill still starts at your invoice. Here is when it applies, who fills Part A and Part B, and the exact steps for a shipment booked through either platform.
Most ecommerce parcels are under the e-way bill threshold, which is why the one order that crosses it gets missed. Here is when an online seller needs an e-way bill, who generates it when a courier or marketplace moves the goods, and how to raise one from the invoice.
A Shopify store is not a marketplace, so nobody collects TCS or prints invoices for you. Every order needs its own GST invoice, and GSTR-1 and GSTR-3B are built from those invoices. Here is the order-to-return path, table by table.
Flipkart collects TCS on every sale and sends a large share of orders back as customer returns or RTO. Both need credit notes against the original invoice, or your GSTR-1 overstates sales and disagrees with Flipkart's GSTR-8. Here is the full monthly routine.
Every referral, closing, FBA and shipping fee Amazon deducts from your payout carries 18 percent GST, and that GST is claimable input tax credit. Most sellers never claim it because they never download the invoices. Here is where they are and how to claim without a mismatch notice.
Amazon gives you two Merchant Tax Reports a month and collects TCS on every sale, but it does not file your returns. Here is how the MTR B2B and B2C reports map to each GSTR-1 table, how refunds become credit notes, and how the TCS credit gets into GSTR-3B.
