I have Mismatch in Dvat for the FY 2011-12 & 2012-13. Alhough the default is of the seller as I have all the Tax Invoices with me but the seller have not provided the credit for the same. Since, the returns cannot be revised online for this period. Please advice me how can I clear all the mismach? Do I have to File an appeal? If yes, then How?