E-invoices and e-way bills generated from your own software

How does e-invoice API integration work?

For businesses required to issue e-invoices, each B2B invoice has to be reported to the Invoice Registration Portal, which validates it and returns an IRN with a signed QR code. Done by hand, that means exporting invoice details and uploading them. With an API integration, your own software sends the invoice data, stores the IRN and QR code it gets back, and puts them on the invoice.

E-way bills come from the same data: once an invoice has an IRN, the e-way bill can be generated from it and updated later, for example when the vehicle changes. Access to these APIs usually runs through a GST Suvidha Provider (GSP); which route suits your setup is decided on the scope call.

What happens on the purchase side each month?

GSTR-2B is the statement of input tax credit built from what your suppliers have reported. The package reconciles it with your purchase records, so an invoice a supplier has not reported, or has reported with a different amount, shows up as a mismatch alert before you file, while there is still time to follow it up with the supplier.

GSTR-1 and GSTR-3B data is prepared from the same records, so the returns and the e-invoices start from one set of numbers. Every invoice, IRN and e-way bill is kept in an audit-ready archive you can go back to when a question comes up.

Do you need this if you already bill from TallyPrime?

Perhaps not for IRNs alone. TallyPrime has its own e-invoicing, so if every invoice is raised in Tally, that may already cover generation. This package is built for businesses whose invoices come from their own billing software, ERP or portal, and for teams who want 2B reconciliation and mismatch alerts on top. Tally is in the listed stack, so where your purchase records live, in Tally or elsewhere, is settled on the call.

If all you need is invoices from your app posted into Tally as vouchers, Tally Integration & Automation starts at ₹12,000 and is the smaller job. If the purchase-side problem is vendor invoices waiting for matching and approval, Accounts Payable Automation starts at ₹45,000.

What stays with you and your CA?

The package prepares the data for GSTR-1 and 3B and flags mismatches; submitting the returns on the portal is not a separate item in the feature list, so who files, your team or your CA, is settled on the scope call. Any fees charged by a GSP or other provider you connect through are separate from this package’s price. The API work covers the billing systems named in your proposal, and adding another source later is scoped on its own.