GST discrepancy reply form requires reporting discrepancies, admitted payments, and a verified declaration under section 61. Form GST ASMT-11 is the prescribed response to notices under section 61, requiring GSTIN and taxpayer identification, notice reference and tax period, itemised replies to each discrepancy, and monetary particulars for amounts admitted and paid under tax, interest and other heads. The form culminates in a verification clause where an authorized signatory affirms the accuracy of the response with name, designation, signature and date, thereby recording admission/payment and verified declaration for assessment and audit purposes.