Supplier Not Filed GSTR-1: Find Missing Purchase Bills in GSTR-2B and Protect Your ITC

You booked the purchase bill in BUSY, paid the supplier and kept the invoice in the file. Yet the input tax credit is not yours until the supplier reports that bill in his GSTR-1 and it shows in your GSTR-2B. Every month some suppliers file late, file under the wrong GSTIN or forget a bill, and the credit quietly slips away. This guide shows a simple monthly routine to catch those bills early.

The rule in short

• Section 16(2)(aa): ITC is available only for invoices and debit notes the supplier has furnished in GSTR-1 / IFF and that are communicated to you in GSTR-2B.
• Rule 36(4): ITC claimed in GSTR-3B is limited to what appears in GSTR-2B; there is no extra provisional credit any more.
• DRC-01C (rule 88D): if the ITC claimed in GSTR-3B is more than GSTR-2B by more than the notified limit, the system sends an intimation and asks you to pay or explain.
• Time limit (section 16(4)): credit for a year's bills can be taken up to 30 November of the next year or the annual return date, whichever is earlier. See our 30 November ITC guide.

Three lists to make every month

Why a bill goes missing from GSTR-2B

• The supplier is on QRMP and reports quarterly: the bill appears in the 2B of the quarter's last month.
• The supplier typed a wrong GSTIN or reported the sale as B2C, so it went to nobody or to someone else.
• The supplier filed GSTR-1 after the 2B cut-off date: it appears in next month's 2B.
• The supplier has not filed at all, or his registration is cancelled.
• A typing difference: bill number, date or amount in BUSY differs from what he reported, so it looks missing on one side and extra on the other.

Monthly routine, step by step

1. Finish purchase entry

   Book all purchase bills, debit and credit notes of the month in BUSY before you match anything.

2. Download GSTR-2B

   GSTR-2B for a month is generated around the 14th of the next month. Take the latest 2B (and act on IMS before the 3B is filed; see 2B after IMS).

3. Match bill by bill

   Match on supplier GSTIN, bill number, date and tax. Treat number / date / amount differences separately from truly missing bills.

4. Follow up supplier-wise

   Make one list per supplier with bill number, date and tax missing. Send it by e-mail or message and note the date. Two reminders usually fix most cases.

5. Claim when it appears

   When the bill shows in a later GSTR-2B, claim it in that month's GSTR-3B. Keep the missing list open until the 30 November deadline.

6. Change supplier if needed

   A supplier who keeps missing bills costs you real money: weigh that when you place the next order.

Doing it by hand vs with a tool

In Excel, matching a few hundred bills means sorting two sheets and checking each row by eye, every month. Bharat GST Champ reads the GSTR-2A / 2B that BUSY has downloaded (or a JSON from the portal), loads it with F5 and puts every portal bill next to your BUSY vouchers in colours, inside BUSY itself.

Limits, form numbers and due dates are notified by the government and change from time to time. Check the current rules or your CA before acting.

Need help setting this up in BUSY? Our team installs and trains remotely anywhere in India. Call +91-93149 87634 or see BUSY services.

Related: GSTR-2B after IMS · ITC reversal: 180 days and rule 37A · Bharat GST Champ

Updated 11-11-2026 · Bharat Busy Care, Authorised BUSY Platinum Partner