What einvoice1 gst means in day-to-day billing: the IRN, the signed QR code, the cancellation window, and the master data that decides whether any of it works.
What e-invoicing actually is
It is not a government invoice format you fill in. You raise your invoice in your own software as usual; the software sends a structured version to the invoice registration portal, which validates it, assigns an Invoice Reference Number (IRN) and returns a digitally signed QR code.
Your invoice then carries that IRN and QR code. The reported data also flows into your GSTR-1 and into e-way bill generation, which is the actual point of the exercise — one reporting event instead of three.
The threshold at which it becomes mandatory has been reduced in several stages since introduction. It is turnover-based and it has moved more than once, so verify the current position rather than relying on any article, including this one.
The registration portal, and what it does
The Invoice Registration Portal is the government system that receives invoice data, validates it, assigns an Invoice Reference Number and returns a digitally signed invoice with a QR code. There is more than one such portal operated under the scheme, which is why the addresses people search for vary.
What goes to it is structured data in a prescribed schema, not a PDF of your invoice. What comes back is the IRN and the signed QR code, which then have to appear on the document you give the customer.
Taking data there is done either by uploading a file, through the portal's own tools, or through a provider that submits on your behalf from your billing software. That last route is what most businesses use, because manual upload for every invoice does not scale.
Two things worth knowing: the portal has offline utilities for bulk preparation, and it has downtime. What your process does when it is unavailable is a question to settle in advance, because billing cannot simply stop and an invoice issued without an IRN when one was required has to be dealt with afterwards.
We do not reproduce portal addresses or screen sequences here, because they change. Go to the official GST portal and follow its links rather than a third-party page, including this one.
What matters in your billing software
- Complete party masters — GSTIN and state on every registered customer, validated in format.
- HSN or SAC on every line, without exception.
- Place of supply derived, not chosen, so it can never contradict the parties.
- A clean, consecutive invoice series — duplicates are a rejection cause.
- Correct document types for credit and debit notes, referencing the original.
- Discipline about editing. A registered invoice cannot be altered; corrections are cancellation within the window or a credit note.
- Billixo enforces the first four by design, which is most of what the portal is checking.
The flow, step by step
- Confirm whether e-invoicing applies to you, based on the current turnover threshold.
- Complete your masters: GSTIN and state on parties, HSN or SAC on every item.
- Raise the invoice in your billing system as normal.
- The structured invoice is sent to the registration portal.
- The portal validates it and returns the IRN and a signed QR code.
- Print or share the invoice carrying the IRN and QR code.
- If it is rejected, read the reason before retrying — the usual causes are a missing HSN, an invalid GSTIN, a place-of-supply mismatch or a duplicate invoice number.
If e-invoicing does not apply to you yet
Bill as though it might. The turnover threshold has only ever moved in one direction, and the work involved in being ready is work worth doing anyway: complete GSTINs, HSN on every line, place of supply derived rather than typed.
A business already billing that way flips a switch when the threshold reaches it. A business that is not spends a fortnight cleaning masters under a deadline.
The free plan produces invoices with all of those fields, which makes it a reasonable place to build the habit. Start free now.
Cancellation, amendment and getting it wrong
A registered invoice cannot be edited. It can be cancelled within a limited window after registration, and after that the only route is a credit note referencing it.
That makes the check-before-you-register habit worth building. In practice it means reviewing the party, the place of supply and the totals on screen before generating, rather than after the customer queries it.
It also means your invoice numbering has to be right first time: a cancelled IRN does not release the invoice number for reuse.
Credit notes, debit notes, and fixing a wrong invoice
An issued tax invoice is not something to edit. If the value was too high, or goods came back, the correction is a credit note that references the original invoice. If it was too low, a debit note. Both carry their own numbers and both appear in your return.
There is a deadline on the credit note that matters: the adjustment has to be declared by the return for the relevant month of the following financial year, or by the annual return, whichever comes first. Past that, the note exists commercially but the tax cannot be adjusted.
Software that lets you quietly retype an invoice raised last month is not doing you a favour.
Reverse charge, exports and the supplies that behave differently
Not every supply is a straightforward taxable sale. Some notified supplies put the tax liability on the recipient rather than the supplier. Exports and supplies to an SEZ can be made under a bond or LUT without payment of tax, or with tax and a refund claimed afterwards. Composition dealers cannot charge tax at all and must say so on the bill.
Each of these changes what the invoice has to say — the reverse charge marking, the LUT reference, the "composition taxable person" declaration. They are not exotic cases; most businesses hit at least one.
The fields are on the invoice in Billixo whether or not you use them, so the day you need one you are not looking for a workaround.
The AI, and what it is actually for
The useful application of AI to billing is not a chatbot. It is the twenty minutes a day spent retyping things that already exist on paper.
- Scan a supplier bill. Photograph it; the lines, the GSTIN, the tax and the totals come back as a draft you check rather than a form you fill.
- Find the HSN code. Describe the product in plain words and get a code to confirm, instead of scrolling a list of eleven thousand.
- Ask about your own numbers. "What is outstanding over sixty days?" answered from your data, not a manual.
- Write the reminder. A polite, specific chase for an overdue invoice, ready to send on WhatsApp.
Nothing is sent anywhere until you ask for it, and the platform runs on whichever model it has been configured with — including one hosted on your own server.
Who this actually suits
It fits a business that raises between a handful and a few hundred invoices a month and would rather not think about GST between the 10th and the 20th: traders, distributors, retail counters, workshops, agencies, consultants, contractors and manufacturers who sell on invoice.
It fits less well if you need deep manufacturing costing, multi-currency consolidation, or payroll — those are different products, and pretending otherwise wastes your evaluation time.
If you are not sure which side of that line you fall on, the free plan answers it in an afternoon at no cost. Start free now.
The price, plainly
Free is ₹0 and stays ₹0. The paid plans are bought for a fixed term, paid once, with no auto-renewal and no card kept on file — when a term ends the account drops back to Free until you decide to buy again.
There is no per-invoice charge, no per-user surprise on the free plan, and no feature that is technically included but practically throttled. What the plan says you get is what you get.
Compare the plans on the home page, or just start free now and look at the ceiling from the inside.
Where your data lives
On the server this platform is installed on. Every record carries a company identifier and every query is scoped to the signed-in account at the framework level, so one business cannot read another’s data by any route, including a crafted one.
Sign-in is rate limited, sessions can be restricted to one device per user, and passwords are stored hashed. Exports are available on every plan, free included: if you ever want to leave, your data leaves with you.
Frequently asked questions
What is an IRN?
The Invoice Reference Number returned by the invoice registration portal when it accepts your invoice. It comes with a digitally signed QR code, and both must appear on the invoice you give the customer.
Can I edit an e-invoice after generating it?
No. It can be cancelled within a limited window after registration; after that a credit note referencing the original is the only correction route.
Why do my e-invoices get rejected?
Overwhelmingly four causes: a missing HSN or SAC, a malformed or invalid GSTIN, a place of supply that contradicts the parties, or a duplicate invoice number. All four are master data problems rather than portal problems.
What happens to my data if I stop paying?
Nothing is deleted. The account settles back onto the Free plan: the paid conveniences switch off, the volume limits return, and every invoice, customer and product you created stays exactly where it is — including the export.
Does it work on a phone?
Yes. It is a browser application that adapts to the screen, so the same account works from a desktop at the counter and a phone in the market. There is no separate app to keep in step.
See it working on your own bills
The fastest way to judge billing software is to bill with it. Photograph one supplier invoice, raise one sales invoice, and look at the PDF your customer would receive.
Open the software demo → — free account, no card, about a minute to set up.
More details on the home page → — what it does, what it costs, and where the limits are.
Related pages