Input service distributor returns require distribution of eligible and ineligible ITC within the tax period. Form GSTR-6 prescribes reporting by an Input Service Distributor of supplier invoices, computation of total, eligible and ineligible Input Tax Credit (ITC), and distribution of ITC to recipient units with GSTIN or state details. It includes tables for amendments, debit/credit notes, redistribution of wrongly distributed ITC, mismatch liabilities (system-populated) and late fee entries. ISDs must distribute both eligible and ineligible ITC in the same tax period of receipt; filing is permitted only after the 10th and before the 13th of the succeeding month; refunds from the electronic cash ledger result in corresponding debit entries.