Purpose of the FormAlerts you that ITC availed in GSTR-3B exceeds ITC available in GSTR-2B past the Rule 88D tolerance.
Practical Tips Again, 7 days to pay/reverse excess ITC (DRC-03) or justify the variance in Part B. Reconciliation should cite supplier-wise break-up and pending amendments. Ignoring it can block subsequent GSTR-1 and trigger recovery action.