If your business crosses the GST e-invoicing threshold, an invoice issued without a valid Invoice Reference Number (IRN) is not a valid tax invoice. Your buyer can lose their input tax credit (ITC)—and your business gets the blame.
InfiBis v1.0.0 now generates, cancels, and regenerates GST e-invoices directly from the invoice screen. No government portal tab-switching. No manual JSON payload uploads.
What Is a GST E-Invoice and an IRN?
An e-invoice is a standard tax invoice reported to the government's Invoice Registration Portal (IRP) in the prescribed JSON format. The IRP validates the document and returns a unique 64-character Invoice Reference Number (IRN), a cryptographic digital signature, and a QR code, which must appear on the physical or PDF invoice delivered to the buyer.
The IRN is the invoice's legal identity. Without it, an invoice issued by an enterprise covered under the mandate is legally void for GST compliance.
Who Must Issue E-Invoices in 2026?
Two separate compliance tests apply under Indian GST regulations, and they are often confused:
| Compliance Test | Threshold | What It Decides |
|---|---|---|
| E-Invoicing Mandate | Aggregate annual turnover above ₹5 crore in any financial year since 2017–18 | Whether you must generate IRNs for B2B transactions |
| 30-Day Reporting Limit | Aggregate annual turnover of ₹10 crore and above | The IRP rejects invoices, credit notes, and debit notes reported more than 30 days after document date |
A business with turnover between ₹5 crore and ₹10 crore must still generate an IRN, but is not currently subject to the 30-day reporting block. Above ₹10 crore, businesses face both rules. Always confirm your turnover status against the latest GSTN notifications or with your Chartered Accountant.
What InfiBis Does for GST E-Invoicing
Rather than logging into separate third-party portals or managing cumbersome offline JSON utilities, InfiBis natively integrates the full e-invoicing workflow:
1. Generate IRN in One Click
Create the invoice in InfiBis, click generate, and the 64-character IRN and signed QR code attach directly to the invoice record. The e-invoice schema is generated automatically from the data you already hold: buyer details, line items, HSN codes, and tax breakups.
2. Validate Before Submission: HSN and GSTIN Checks
The vast majority of IRP rejections stem from basic data discrepancies: a malformed 15-character GSTIN, an invalid or missing HSN code, or tax calculation mismatches. InfiBis validates GSTINs and HSN codes before the payload leaves your system, surfacing errors while you can still fix them in seconds.
3. Cancel with Mandatory Reason Code
Made a mistake? The IRP allows cancellation only within 24 hours of IRN generation, and every cancellation request requires an official reason code. InfiBis captures the cancellation reason as part of the flow, ensuring the request is accepted by the portal and your internal books maintain an audit trail.
After 24 hours, the IRN cannot be cancelled on the IRP. The legal remedy is to issue a credit note against the invoice.
4. Regenerate After Correction
An IRN cannot be modified or edited. The compliant path is: cancel the incorrect IRN, update the invoice fields, and issue again. InfiBis allows you to regenerate the e-invoice after cancellation without rebuilding the entire invoice line by line.
5. Sandbox and GSP Connectivity
Sandbox: Test your entire e-invoicing workflow with dummy invoices before going live. Train your billing staff without touching real tax data or posting erroneous records to the government registry.
GSP Providers: InfiBis connects through certified GST Suvidha Provider (GSP) integrations, giving you reliable uptime and direct connectivity.
Common E-Invoice Mistakes InfiBis Helps You Avoid
- Invalid Buyer GSTIN: Caught during automated validation before dispatch to the portal.
- Wrong HSN Code or Tax Rate: Verified before submission, preventing invalid payload errors.
- Cancelling Too Late: The 24-hour window is strict. InfiBis highlights cancellation status so you can act immediately.
- Attempting to Edit an IRN: InfiBis guides you to cancel and regenerate, or issue a credit note after 24 hours.
- Reporting Late: For businesses with ₹10+ crore turnover, generating IRNs at the time of sale prevents month-end 30-day portal rejection.
Who Benefits Most
- Manufacturers and Wholesale Distributors: Businesses invoicing registered B2B clients daily.
- Growing MSMEs Crossing ₹5 Crore: Companies newly entering the e-invoicing mandate that need instant compliance without adding overhead.
- Accountants and CAs: Professionals seeking clean GSTR-1 data, eliminated ITC disputes, and zero rejected uploads.
Start Generating Compliant E-Invoices
GST e-invoicing is built directly into InfiBis v1.0.0 alongside E-Way Bills and standard GST billing. Explore our 14-day free trial, try our GST invoice generator, or start with sandbox mode today.
Disclaimer: This article is for informational purposes only and does not constitute tax or legal advice. GST rules and thresholds change periodically. Verify applicability against current government notifications or consult a qualified professional.