CORAA
University · GST control desk · GSTR-2B / 3B

GST 2B reconciliation Checker.

Compare purchase-book ITC, GSTR-2B and GSTR-3B at control-total level, then split the queue into timing, supplier, duplicate and eligibility issues.

Enter control totals
Control result
StatusExceptions to review
Books → GSTR-2B gap₹25,000
GSTR-2B → GSTR-3B gap₹35,000
ITC available but not claimed₹35,000
Potentially ineligible ITC₹35,000
GSTIN / supplier issues4
Duplicate documents2
Do not treat an available 2B amount as automatically claimable. Test eligibility, blocked credits, reversals, supplier amendments, period and document evidence row by row.

Separate availability from eligibility.

The most useful GST reconciliation does not stop at “in 2B” or “not in 2B”. It tells the reviewer whether the invoice is in the books, whether the supplier identity is correct, whether the credit is legally eligible, and whether the claim or reversal reached GSTR-3B.

Open GST working paperRead the AI reconciliation playbook

How to use the checker

Enter the ITC totals from books, GSTR-2B and GSTR-3B. The directional gaps show whether the first review should start with books-to-statement, statement-to-return or eligibility.

Add issue counts from the invoice-level reconciliation. The tool keeps counts separate because one invoice can have more than one problem.

Export the control sheet and attach the row-level file, 2B snapshot, 3B filing evidence and reviewer sign-off.

Common mistakes

Netting timing differences
A supplier filing in the next period may explain an absence from the current 2B, but it should remain an owned exception until the evidence arrives.
Ignoring duplicates
Duplicate invoice numbers, credit notes and amended documents can inflate an otherwise tidy control total.

Frequently asked questions

Does GSTR-2B prove ITC is claimable?+
No. It is availability evidence. Eligibility, blocked credits, business use, reversals, documentation and other conditions still require review.
What should an AI GST reconciliation output contain?+
A proposed match, reason code, confidence, source row and next action. Low-confidence matches and legal eligibility decisions should remain with the reviewer.
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GST reconciliation working paperGSTR-9 ITC mapperGST reconciliation workflow
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Last reviewed: 2026-07-18 · For informational purposes only — not professional advice.