Indian merchants must issue a tax invoice for every sale, with the CGST+SGST versus IGST split decided by where goods ship from and ship to. This app does that as orders arrive, working the tax out itself rather than copying Shopify's tax lines. A GST invoice cannot legally be changed once issued, so refunds raise credit notes and order edits raise debit notes. At month end, download GSTR-1 and GSTR-3B as JSON in the structure the government's offline tool uses, plus workings for your CA.

• Tax invoice for every order, with CGST+SGST or IGST worked out per order
• Credit and debit notes raised automatically on refunds, cancellations, edits
• GSTR-1 and GSTR-3B filing exports, plus a full working pack for your accountant
• Sequential, no-gap document numbering in your own financial-year format
• Per-product HSN/SAC codes and GST rates, including slab based GST rates