A plain-language walkthrough of IRN, QR codes and where businesses most often get stuck.
E-invoicing did not change what an invoice is. It changed when it becomes valid, and that difference is what catches businesses out.
The invoice is registered before it is issued
The invoice details are reported to the invoice registration portal, which returns an invoice reference number and a signed QR code. Only then is the document valid for the customer to claim credit against. An invoice printed and sent without that step is not simply late; it is not an e-invoice.
Where businesses get stuck
Common failures are mismatched customer GST details, incorrect HSN codes, generating the reference after the goods have left, and no process for cancellation, which has a tight window. Reconciling what you registered against what you booked is the control that catches these early.
The upside is the auto-population
Once registered, data flows into your returns and into the e-way bill without re-entry. Businesses that treat e-invoicing as a compliance chore keep typing things twice; those that connect it properly remove a whole layer of manual work.
Check the applicability threshold against your turnover annually, since it has moved several times and catches businesses that were previously exempt.
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