What's the ONE thing about GSTR-2B / IMS reconciliation that drives you crazy?

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For those doing this every month — for me the invoice-number mismatches (SALES/25-26/1 in books vs SALES25261 on the portal) and the 6-day IMS window feel brutal. What's your single biggest time-sink — and does your tool (ClearTax/Tally/Excel) actually handle it, or do you end up doing it by hand?

Replies (4)
Quick Summary
GSTR-2B and IMS reconciliation is often slowed by invoice number mismatches, supplier amendments, and the short IMS action window. Accepted invoices may require future corrections, while pending invoices can delay ITC claims. Many firms still rely on manual checks despite using GST software.

The reconciliation of GSTR-2B and IMS is primarily plagued by formatting inconsistencies (such as removed special characters) and tight deadlines. The most effective way to resolve this "time-sink" is to either standardize invoice numbering at the source or use reconciliation tools that employ fuzzy matching algorithms to intelligently recognize discrepancies in invoice formats.

The biggest issue for most clients is that once you ACCEPT an invoice in IMS, the ITC gets locked in Table 4A and you cannot edit it manually in GSTR-3B anymore. If the supplier later amends the invoice (value or GSTIN correction), the amendment does not auto-update the accepted figure.

The fix requires:
1. Supplier to file an amendment in GSTR-1 Amendment (Table 9A/9B)
2. The correction to reflect in the NEXT month's GSTR-2B
3. You to then re-process in IMS

Means a 1-2 month lag on any supplier correction, during which your GSTR-3B has a wrong ITC figure and you either pay more tax or risk a mismatch notice.

The second pain point: PENDING status in IMS. Many practitioners set invoices to PENDING thinking it is a neutral state. It is not ,  PENDING means you have not acted and the ITC is excluded from auto-population until you accept or reject. If you file GSTR-3B with auto-populated ITC without processing all pendings, you miss legitimate credits.

For a step-by-step IMS workflow and GSTR-2B reconciliation process, this [GST return filing guide](https://taxgarden.in/gst-return-filing) covers the IMS actions and credit claim flow.

The biggest issue for most clients is that once you ACCEPT an invoice in IMS, the ITC gets locked in Table 4A and you cannot edit it manually in GSTR-3B anymore. If the supplier later amends the invoice (value or GSTIN correction), the amendment does not auto-update the accepted figure.

The fix requires:
1. Supplier to file an amendment in GSTR-1 Amendment (Table 9A/9B)
2. The correction to reflect in the NEXT month's GSTR-2B
3. You to then re-process in IMS

Means a 1-2 month lag on any supplier correction, during which your GSTR-3B has a wrong ITC figure and you either pay more tax or risk a mismatch notice.

The second pain point: PENDING status in IMS. Many practitioners set invoices to PENDING thinking it is a neutral state. It is not ,  PENDING means you have not acted and the ITC is excluded from auto-population until you accept or reject. If you file GSTR-3B with auto-populated ITC without processing all pendings, you miss legitimate credits.

For a step-by-step IMS workflow and GSTR-2B reconciliation process, this [GST return filing guide](https://taxgarden.in/gst-return-filing) covers the IMS actions and credit claim flow.

The biggest issue for most clients is that once you ACCEPT an invoice in IMS, the ITC gets locked in Table 4A and you cannot edit it manually in GSTR-3B anymore. If the supplier later amends the invoice (value or GSTIN correction), the amendment does not auto-update the accepted figure.

The fix requires:
1. Supplier to file an amendment in GSTR-1 Amendment (Table 9A/9B)
2. The correction to reflect in the NEXT month's GSTR-2B
3. You to then re-process in IMS

Means a 1-2 month lag on any supplier correction, during which your GSTR-3B has a wrong ITC figure and you either pay more tax or risk a mismatch notice.

The second pain point: PENDING status in IMS. Many practitioners set invoices to PENDING thinking it is a neutral state. It is not ,  PENDING means you have not acted and the ITC is excluded from auto-population until you accept or reject. If you file GSTR-3B with auto-populated ITC without processing all pendings, you miss legitimate credits.

For a step-by-step IMS workflow and GSTR-2B reconciliation process, this [GST return filing guide](https://taxgarden.in/gst-return-filing) covers the IMS actions and credit claim flow.

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