GST reconciliation is the process of comparing:
Purchase records and books of accounts
GSTR-2B and supplier-reported data
GSTR-3B returns already filed
In practice, mismatches are common. Suppliers may delay filing returns, upload incorrect invoices, or amend data later. If reconciliation is ignored, it often leads to excess ITC claims, interest liability, or departmental notices.
From real cases handled at our Dwarka office, most GST disputes start with poor reconciliation rather than intentional non-compliance.