Made a wrong bill? How to cancel or correct a GST invoice

You can't delete a GST invoice, but you can cancel it: if the bill hasn't gone into a filed GSTR-1 yet, mark it cancelled, keep the copy, and issue a fresh bill with the next number. Once it has been reported, you correct it with a credit note (you charged too much) or a debit note (you charged too little), or by amending the details in a later GSTR-1.

The right route depends on timing, not on the size of the mistake. This guide takes each case against the CGST Act and the GST portal's manuals, with a small kitchen's usual problem in mind: a wrong item noticed minutes after the bill went out on WhatsApp.

Can we delete an invoice in GST?

No. Nothing in the GST law lets you erase a bill once it has been issued, and two rules make that clear in practice.

First, Rule 46(b) asks for "a consecutive serial number", up to 16 characters, "unique for a financial year". A deleted bill leaves a hole in the series that nobody can explain, and reusing its number breaks the "unique" part.

Second, Rule 56(8) says electronic records must keep a log of every entry edited or deleted. Quietly changing a bill after it was sent is exactly what that log exists to catch.

So the honest version of "delete" is: mark the bill cancelled, write down why, keep the copy, and move on to the next number.

How to cancel a GST invoice before you file GSTR-1

If the month's GSTR-1 (the return listing your sales) is not filed yet, the wrong bill has not been reported to anyone. You can cancel it and issue a correct one.

A worked example. A customer orders two veg thalis at ₹120 and one paneer roll at ₹90 on WhatsApp. You ring up three thalis by mistake:

• Wrong bill INV/2026-27/0142: taxable value ₹450, GST at 5% ₹22.50 (CGST ₹11.25 + SGST ₹11.25), total ₹472.50.
• Correct order: taxable value ₹240 + ₹90 = ₹330, GST ₹16.50 (CGST ₹8.25 + SGST ₹8.25), total ₹346.50.

What to do, five minutes later:

1. Mark INV/2026-27/0142 as cancelled, with the reason: "Rang up 3 thalis, order was 2".
2. Keep its copy. Don't delete the PDF or the record.
3. Issue INV/2026-27/0143 for ₹346.50 and send it to the customer, telling them to ignore the first one.
4. In GSTR-1, report only the ₹330 of taxable value. The ₹450 bill never happened as a sale.

When you file, the cancelled bill shows up in Table 13, "Documents issued". The GSTR-1 user manual has you enter each series of documents you issued, and the portal then shows total, cancelled and net issued documents. If you issued 0101 to 0180 in October with one cancelled, that is 80 total, 1 cancelled, 79 net. GSTN made Table 13 mandatory from the May 2025 return period (advisory of 1 May 2025), so the count has to be right.

Already filed GSTR-1 but not yet GSTR-3B for that month? The proviso to Rule 59(1) lets you amend the details in Form GSTR-1A before you file GSTR-3B for the same period. After GSTR-3B, use the routes below.

Credit note vs cancel invoice: which one after GSTR-1?

Once the bill is in a filed return, the supply is on record. You don't cancel it; you issue a second document that corrects it.

Charged too much: credit note. Section 34(1) allows a credit note when the taxable value or tax on an invoice "is found to exceed" what was payable, or when goods come back or were deficient. Take the thali example, but say the customer paid ₹472.50 and noticed only after October's GSTR-1 was filed. You issue a credit note for one thali: taxable value ₹120, GST ₹6 (CGST ₹3 + SGST ₹3), total ₹126, and refund ₹126. ₹472.50 − ₹126 = ₹346.50, the right amount.

Charged too little: debit note. Section 34(3) says you "shall issue" a debit note when the value or tax was lower than it should be. Forgot to bill the ₹90 paneer roll? A debit note for ₹90 plus ₹4.50 GST, total ₹94.50. The Act treats a supplementary invoice as a debit note.

Only details wrong: amend. If the tax was right but a detail was wrong, such as an office customer's GSTIN, section 37(3) lets you rectify it. The GSTR-1 manual does this in a later month's Table 9A (bills to registered customers and large B2C bills) or Table 10 (other B2C sales).

Credit and debit notes are documents in their own right. Rule 53(1A) asks for their own number series (16 characters, unique for the year), the date, the customer, the taxable value and tax, and the number and date of the original invoice.

What is the time limit for a credit note?

Section 34(2) says a credit note must be declared no later than 30 November following the end of the financial year of the supply, or the date you file the annual return for that year, whichever is earlier. For a bill dated 18 Oct 2026 (FY 2026-27), that is 30 Nov 2027 at the latest, and earlier if you file the annual return before then.

The same 30 November cut-off applies to amending GSTR-1 under the proviso to section 37(3).

A credit note only lowers your tax if one more condition holds. The proviso to section 34(2) says no reduction is allowed if a registered customer has not reversed the matching input tax credit (ITC, the GST a business claims back on its purchases), or, in other cases, if the tax was passed on to someone else. For a household customer, that is why the refund matters: if you keep the extra ₹6, you cannot also cut ₹6 from your tax. How to show a B2C credit note in the return is something to settle with your CA.

Debit notes have no deadline in section 34(4). They go in the return for the month you issue them, and the extra tax is due then.

Can an e-invoice be cancelled after 24 hours?

Not on the portal. An e-invoice here means a bill registered on the government's Invoice Registration Portal (IRP), which returns an Invoice Reference Number (IRN). Under Notification 10/2023-CT it applies only above ₹5 crore turnover and only to bills for registered businesses and exports, so most home kitchens never generate one.

If you do, the e-invoice system's Cancel IRN rules are short:

• An IRN can be cancelled within 24 hours of generation.
• It cannot be cancelled while a valid e-way bill exists for it.
• The request takes only the IRN and a reason: duplicate, data entry mistake, order cancelled or others. There is no way to cancel part of an invoice; it is the whole bill or nothing.

The Generate IRN rules add that an IRN "cannot be re-generated" for a cancelled e-invoice, so the replacement needs a new invoice number. Past 24 hours, the IRP won't help. The usual fix is a credit or debit note, or an amendment in GSTR-1. Which one fits your case is a question for your CA.

Does the 57th GST Council change any of this?

Not for your sales bills, and not yet. The Council's release of 8 Oct 2026 recommended new rules (sub-rules (1A) and (1B) in Rule 61) for correcting tax and ITC in GSTR-3B so it matches GSTR-1 and GSTR-2B, with the "alternate mechanism for amendment of liability and ITC" to start from the return for April 2027.

That is about lining up your returns, not cancelling a bill, and as of 18 Oct 2026 it is a recommendation with no notification behind it. Our summary of the 57th GST Council covers the rest of the meeting.

How Pocket Journal handles a wrong bill

Pocket Journal is billing software built for each kind of business, and in the food app a wrong bill is voided, never edited or deleted.

• Void from the bills list. Each bill's row menu has Void. Owners and managers can use it; a cashier can't.
• A reason is compulsory. The Void button stays off until you type a reason, and the database refuses a void without one.
• The number stays used. A voided bill keeps its invoice number and its figures, and stays in every export. The bill, as an image or PDF, prints "VOID — NOT PAYABLE" with the reason under it.
• The day book is reversed, not rewritten. If the bill was paid, voiding adds a new "Sale voided" entry dated today that points back to the original sale. If it was an unpaid credit bill, it simply stops being owed. If part of a credit bill was already paid, you reverse that payment in the ledger first.
• Reports leave it out. The sales report keeps voided bills out of its totals and its GST summary, and shows them on a separate "Voided" tile with their count and value: the cancelled figure your CA needs for Table 13.

Then issue a fresh bill for the corrected order. It takes the next number in the series, so 0142 voided is followed by 0143, with no gap and no repeat.

What it does not do yet: issue credit notes or debit notes. If a mistake turns up after your GSTR-1 is filed, prepare the note with your CA.

What should a small kitchen do in practice?

Most mistakes are caught within minutes, while the customer is still on WhatsApp: void with a reason, reissue with the next number, send the new bill, keep both.

A few habits keep the trail clean:

• Write a reason a stranger would understand. "Wrong qty, 3 thalis instead of 2" beats "error".
• Check Table 13 against your cancelled count before filing GSTR-1.
• Get mixed-rate discounts right before you send. A discount on a bill with items at different GST rates is a common reason to void. Our guide to splitting a discount across different GST rates shows the maths.
• Keep app orders apart. The app pays the GST on food ordered through it, so those orders belong in a separate set of records from your own bills. See accounting for Swiggy, Zomato and direct orders.

The bill you send on WhatsApp is only the delivery; your billing record is what counts. More on that in sending GST bills on WhatsApp.