India GST E-Invoicing & E-Way Bill (IRN/NIC) is a build-to-order Odoo module that ECOSIRE designs, builds, installs, and supports for your specific GST registration and workflow — this is not a pre-packaged apps.odoo.com download you install yourself. Over a one working week engagement we ship a production-ready connector that pushes your Odoo customer invoices to the NIC e-invoice system (either directly or through your chosen GSP), retrieves the Invoice Reference Number (IRN), Acknowledgement Number, and the government signed QR code, and stamps them back onto the invoice and its PDF — all inside standard Odoo accounting, with no copy-pasting into the government portal.

Under the hood the module extends account.move with dedicated fields (IRN, ack number, ack date, signed invoice, signed QR payload, e-invoice status) declared on a Python models.Model class, computed and guarded through @api.depends and @api.constrains so a document can only be transmitted when it is genuinely eligible. A configurable service layer handles authentication and calls to the IRP/GSP over JSON-RPC/REST, builds the GST schema (INV-01) JSON from your invoice lines, taxes, HSN/SAC codes and GSTINs, and parses the response defensively — surfacing NIC error codes as readable Odoo messages instead of raw stack traces. QWeb report templates are extended so the signed QR image and IRN print on the tax invoice exactly where auditors expect them.

For logistics, the module generates E-Way Bills from the same document flow, captures transporter and vehicle details, supports Part-B vehicle number updates, and links the EWB number back to the delivery and invoice. Automated actions and scheduled jobs (ir.cron) handle the compliance-sensitive timing — for example flagging invoices that are approaching the 24-hour IRN cancellation window and letting authorised users cancel with a reason code before it closes. Access is locked down through ir.model.access.csv plus record rules so only your accounts and compliance roles can transmit, cancel, or view credentials, and every API call is logged for audit.

ECOSIRE builds and tests the module on your target Odoo version (17, 18, or 19), against your sandbox/production NIC or GSP credentials, wires it to your existing chart of accounts and tax configuration, and hands over a working system with documentation, admin training, and a warranty support window. Because it is bespoke, we adapt it to Community or Enterprise, multi-GSTIN branch setups, custom invoice numbering, and any GSP your finance team already uses.