An e-invoice is not an invoice sent by email. It is an ordinary tax invoice whose details have been reported to a government portal, which returns a unique Invoice Registration Number and a signed QR code that then appear on the printed copy.
E-invoicing is a reporting step, not a new kind of invoice. You raise a tax invoice in your own billing software as you always have. Before it is issued to the customer, its details are sent in a standard format to a government Invoice Registration Portal. The portal checks the data, registers it, and sends back a unique Invoice Registration Number, usually shortened to IRN, together with a digitally signed QR code. Your software prints the QR code on the invoice, and that invoice is now an e-invoice.
IRN stands for Invoice Registration Number. It is a long reference generated from details of the document itself, so it is unique to that invoice from that supplier. It is not your invoice number, which you continue to generate in your own series. The QR code is a signed summary of the invoice that anyone can scan to confirm the document was registered, which is why a customer's accounts department may reject an invoice that should carry one and does not.
For a distributor, the useful thing to understand is where the extra step sits in a day that already has quotations, orders, despatches and challans in it.
Two practical consequences follow from this. The first is that your billing software and your e-invoicing have to be the same system or tightly connected, because an invoice that exists in one place and is registered from another will eventually disagree. The second is that the portal can reject data, so your team needs to see the failure at the moment of billing rather than discover it at month end.
| Invoice number | IRN | E-way bill number | |
|---|---|---|---|
| Who creates it | You, in your own series | The registration portal | The e-way bill system |
| What it is for | Identifying the document in your books | Confirming the invoice was registered | Authorising the movement of goods |
| When it appears | When the invoice is raised | When the invoice data is accepted | When goods are despatched |
| Printed on the invoice | Yes | Yes, with the signed QR code | Usually carried with the consignment |
| Applies to | Every tax invoice | Suppliers and documents covered by the rules | Movements covered by the rules |
This is where a guide should stop being helpful and start being careful.
E-invoicing applies to businesses that cross a turnover level notified by the government, and that level has been revised more than once since the system began. Certain categories of supplier and certain document types sit outside it, and some businesses that are not required to register invoices choose to do so because their larger customers prefer it. None of that can be settled from a web page.
So the only responsible advice is this: ask your chartered accountant whether e-invoicing applies to your business today, to which of your documents, and from what date. Then make sure your software can do it when the answer is yes. What a distributor should avoid is discovering the requirement from a customer's accounts department after an invoice has been rejected.
The related requirement most distributors meet at the same time is the e-way bill for moving goods. The two are separate systems with separate rules, but in practice they are generated minutes apart from the same despatch, which is an argument for having both in the software that raises the invoice rather than in three different browser tabs.
If you are choosing or changing software, these are the practical points to check rather than the marketing claim that e-invoicing is supported:
In Aura Business, e-invoice with IRN and QR, the e-way bill, the delivery challan, the tax invoice and credit notes all sit in the same quotation-to-billing suite, so a despatch produces one consistent set of documents. Setup and the applicability question are discussed on a call, and your own accountant confirms what you are required to do.
Invoice Registration Number. It is a unique reference returned by the government's Invoice Registration Portal when the details of a tax invoice are reported and accepted. It is separate from the invoice number you generate in your own series.
No. An invoice emailed as a PDF is simply a delivery method. An e-invoice is an invoice whose details have been reported to and registered by the portal, which returns the IRN and a signed QR code that appear on the document.
That depends on your turnover, your supply categories and the rules in force, which have changed over time. Confirm it with your chartered accountant rather than relying on any general guidance, including this page.
Not directly. Cancellation is permitted only within a window defined by the rules, and after that a correction is made through a credit note or an amendment. This is why catching data errors at the billing screen matters.
No. An e-way bill authorises the movement of goods and is generated from the e-way bill system, while an e-invoice registers the invoice details. They are separate requirements that often arise from the same despatch. See e-way bill software.
Your customer may refuse to accept the document, and you may have a compliance problem. The consequences are a matter for your accountant and the rules in force, which is why applicability should be confirmed before you rely on any billing process.
Tell us how your centre or business works today and we will tell you plainly which parts of this apply to you, and which do not.
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