🧾 GST & E-Invoicing

GST E-Invoicing Software for India (one-click IRN & QR)

Turn any sales invoice into a compliant e-invoice. OEMup pulls the IRN and the digitally signed QR code from the IRP in one click, auto-generates the linked e-way bill where the threshold is crossed, pre-fills your GSTR-1, and tracks the 24-hour cancellation / amendment window for you. Because it lives inside a cloud manufacturing ERP, invoices flow straight from your sales orders and BOMs — not re-keyed.

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✅ E-invoicing is live in production at our launch manufacturers — IRN, signed QR and e-way bill generated from real sales invoices, including at Alfa Pumps.

Why e-invoicing breaks in portals and spreadsheets

E-invoicing sounds like one extra step — submit the invoice, get an IRN back. In practice, doing it through the government portal or off a spreadsheet is where teams lose time and fail audits. The invoice already exists in your billing software; copying it across to the IRP by hand is slow, error-prone, and disconnected from your e-way bill and GSTR-1. Here are the four places it usually breaks:

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Manual IRP entry & re-keying

Typing each invoice again on the IRP portal — or copy-pasting from a spreadsheet — means transposed figures, wrong GSTINs and slow billing.

OEMup: the e-invoice is built from the invoice you already raised — one click, no re-keying.

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JSON validation failures

The IRP rejects payloads for missing HSN, bad pin codes, unit mismatches or schema errors — and a bare portal just throws a code back.

OEMup: invoices are pre-validated before they reach the IRP, with the exact field to fix shown in plain language.

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E-way bill not linked

Generating the e-invoice on one portal and the e-way bill on another, with the same data entered twice, invites mismatches at checkpoints.

OEMup: the e-way bill is generated from the same invoice and linked to the IRN, so the two always agree.

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Missing the 24-hour window

An e-invoice can only be cancelled on the IRP within 24 hours; after that, the only fix is a credit / debit note — easy to miss.

OEMup: the cancellation window is tracked, and amendments are routed through a linked credit / debit note automatically.

The full e-invoicing flow, automated

OEMup follows the invoice from creation to filing — the way the GST system expects it to move — without you touching a second portal:

Create the invoice from a sales orderBill straight from the confirmed sales order (and its BOM-driven items), so quantities, HSN codes, tax rates and customer GSTIN are already correct — not retyped.
Pre-validate & push to the IRPOEMup checks the e-invoice JSON against the schema first, then submits it to the Invoice Registration Portal in one click. Validation errors are surfaced before the IRP sees them.
IRN & signed QR returned and printedThe IRP returns the unique Invoice Reference Number (IRN) and the digitally signed QR code, which are printed on the invoice — ready to share by print, PDF or WhatsApp.
E-way bill auto-generated where neededWhere the consignment value crosses the threshold, the e-way bill is generated from the same data and linked to the IRN — no double entry on a separate portal.
GSTR-1 populated automaticallyEvery e-invoice flows into your GSTR-1 outward-supplies data, so the return is assembled from what you have already billed instead of a month-end collation.

The GST detail, in short: e-invoicing is mandatory for businesses above the prescribed aggregate annual turnover (AATO) threshold notified by the GST Council, for B2B, export and SEZ supplies (the threshold has been lowered in stages, so confirm your current applicability with your CA). The invoice is reported to the Invoice Registration Portal (IRP), which returns the IRN and a digitally signed QR code. Registered e-invoices flow into GSTR-1 automatically. An e-invoice can be cancelled within 24 hours on the IRP; after that, corrections are made via a credit or debit note. We walk through the whole process step by step in our guide to generating an e-invoice.

What you get

One platform for the whole billing-to-filing cycle — with India-first GST defaults out of the box, no per-machine installs, and the same system running your sales, BOMs, inventory and accounting:

One-click IRN + signed QR from the IRP
Bulk e-invoicing for many invoices at once
Automatic e-way bill linkage to the IRN
GSTR-1 auto-feed from registered e-invoices
Cancellation within the 24-hour window
Credit / debit note amendments, linked
Print, PDF & WhatsApp invoice send
B2B, B2C, export & SEZ invoice handling
HSN & tax-rate auto-mapping per item
Error pre-validation before the IRP
Full audit trail of every e-invoice
Cloud access on mobile, desk & office

E-invoicing rarely stands alone — it sits at the end of a sales-to-dispatch flow. See how it links to e-way bill generation and the step-by-step how to generate an e-invoice guide, all inside the same manufacturing ERP software. If you are moving off a desktop tool, weigh it against your current setup with the honest OEMup vs Tally comparison, or see the wider picture in the best manufacturing ERP in India.

GST e-invoicing software — FAQ

What is GST e-invoicing software?

GST e-invoicing software turns a sales invoice into a compliant e-invoice by submitting it to the Invoice Registration Portal (IRP), which returns a unique Invoice Reference Number (IRN) and a digitally signed QR code. The software validates the invoice JSON before it is sent, prints the IRN and QR on the document, links the e-way bill where required, and feeds the data into your GSTR-1 return. OEMup builds all of this into a cloud manufacturing ERP, so the invoice flows from your sales order rather than being re-keyed.

Does OEMup generate the IRN and QR code automatically?

Yes. From any eligible sales invoice you click once to push it to the IRP. OEMup pre-validates the payload, submits it, and receives back the IRN and the signed QR code, which are printed on the invoice. If the IRP rejects the payload, the validation message is shown so you can fix and resend — you do not have to re-enter the invoice on the government portal.

Is e-invoicing mandatory for my business?

E-invoicing is mandatory for businesses whose aggregate annual turnover (AATO) crosses the prescribed threshold notified by the GST Council, for their B2B, export and SEZ supplies. The threshold has been lowered in stages over time, so more businesses are now covered. You should confirm your current applicability with your CA or the GST portal, as the threshold and effective dates are set by notification and can change.

Can it auto-generate the e-way bill from the e-invoice?

Yes. Because the e-invoice and the e-way bill share most of the same data, OEMup can generate the e-way bill from the same invoice and link it to the IRN where the consignment value crosses the threshold, so you do not enter the details twice on two different portals.

How are e-invoice cancellations and corrections handled?

An e-invoice can be cancelled on the IRP within 24 hours of generation, and OEMup tracks that window so you act in time. After 24 hours an e-invoice cannot be cancelled — corrections are made by issuing a credit note or debit note, which OEMup raises and links to the original invoice and carries into GSTR-1.

See e-invoicing run on your own invoice

Book a free 30-minute demo — bring one real sales invoice and we’ll generate the IRN and signed QR from the IRP, link the e-way bill, and show it land in GSTR-1 live. Or leave your details and we’ll send pricing for your team size.