E-Invoice Software and IRN Generation | GSTZen

E-Invoice

Generate Invoice Reference Numbers from the Invoice Registration Portal in whichever way suits your workflow — through our APIs, from an Excel sheet, or directly out of Tally. Signed invoices and QR codes come back ready to print and share.

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What comes back from the portal

Every invoice registered through GSTZen returns with everything the law asks you to carry on the document, and everything your downstream systems need to store.

Invoice Reference NumberThe unique IRN hash for the invoice
Signed QR codeDigitally signed by the IRP, ready to print
Acknowledgement number and dateProof of registration for your records
Signed invoice JSONThe full signed payload, stored and downloadable
E-Way Bill Part-AGenerated alongside where transport details are given
GSTR-1 auto-populationRegistered invoices flow into your outward return

What you can do

E-Invoice API Integration

Connect your ERP or billing software to GSTZen APIs and generate IRNs automatically as invoices are raised.

E-Invoice Excel Integration

Fill in a simple Excel template, upload it, and generate IRNs in bulk — no software changes needed on your side.

E-Invoice from Tally

Raise the invoice in Tally as you always have, and let GSTZen handle IRN generation and the signed QR code behind the scenes.

Cancellation and Amendments

Cancel an IRN within the permitted window and keep a clean audit trail of every change made to an invoice.

Print-Ready E-Invoice Formats

Download signed invoices with the QR code in a customised print layout your customers and transporters can use as-is.

How an invoice gets registered

The same four steps whichever route you come in through.

1

Raise the invoice

Bill as you normally do — in your ERP, in Tally, or on the Excel template.

2

Validate

GSTZen checks the invoice against the IRP schema and flags errors before submission, not after rejection.

3

Register

The invoice goes to the IRP and comes back with an IRN, an acknowledgement, and a signed QR code.

4

Print and share

Download the signed invoice in your own print layout, and let it flow into GSTR-1 and the E-Way Bill.

Pick the route that fits

All three produce the same signed invoice. The difference is how much you want to change on your side.

API

Best for
Businesses billing continuously from an ERP or custom software.
What you change
A one-time integration by your development team.
Volume
Unlimited, invoice by invoice as they are raised.

Excel

Best for
Teams who bill in batches and want to start this week.
What you change
Nothing. Fill the template and upload it.
Volume
Hundreds of invoices in a single upload.

Tally

Best for
Businesses already raising every invoice in Tally.
What you change
Your billing habit stays the same; GSTZen works behind it.
Volume
Single or bulk, straight from your Tally company.

Register your first invoice with GSTZen

Tell us how you bill today and we will set up the route that suits you, then take one live invoice through to a signed QR code with you on the call.

Talk to us