Matching of input tax credit requires reconciliation with supplier returns, with excess credits added to recipient output tax liability.

Matching of inward-supply details with supplier returns, import IGST and duplicate-claim checks leads to final acceptance of matched input tax credit; discrepancies or duplications are communicated. If the supplier does not rectify a discrepancy in the prescribed return period, the disputed amount is added to the recipient's output tax liability in the next return, and amounts added for duplication are included in the month of communication. Such additions attract interest from the date credit was availed; subsequent supplier declaration within the prescribed time permits reduction of the addition and refund of interest to the recipient by electronic cash ledger credit, limited to interest paid by the supplier.

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