GST Invoicing & E-Invoice for India is a build-to-order Shopify app that ECOSIRE designs, builds, installs and supports for your store — it is not an instant App Store download. After purchase, our engineers scope your tax setup, build the app against your store, and hand it over working.

Indian Shopify merchants face a compliance gap: Shopify's native tax engine and order PDFs don't produce legally compliant GST tax invoices, don't handle HSN/SAC line-item classification, and have no path to the Invoice Registration Portal (IRP) for e-invoicing. This app closes that gap.

We connect to your store via OAuth and the Admin GraphQL API, and subscribe to orders/create and orders/paid webhooks. On each qualifying order we generate a sequential, GST-compliant tax invoice carrying your GSTIN, the customer's GSTIN (validated for format and check digit), per-line HSN/SAC codes, and the correct CGST/SGST or IGST split derived from place of supply (intra- vs inter-state). Invoice numbers, tax breakups and document references are persisted in Shopify metafields so they're queryable and survive re-installs.

For B2B and turnover-threshold sellers, the app pushes invoices to the IRP and writes back the IRN and signed QR code onto the PDF and the order record. Credit and debit notes are issued against original invoices with linked references, and you get GST-ready reports (taxable value, tax by rate, by place of supply) exportable for your GSTR filings.

Because every store's catalog, tax registrations and document layout differ, we build to your requirements rather than forcing a generic template. You get a named engineer, source delivered to your store, and an agreed support window. Honest scope: statutory rules change — we keep the app aligned with IRP schema updates during your support term, and quote separately for major regulatory overhauls.