Input Service Distributor returns must report inward supplies, allocate input tax credit, and reconcile ISD ledger monthly. The draft GSTR-06 requires Input Service Distributors to report inward supplies and allocate input tax credit across IGST, CGST and SGST, with supplier and invoice details auto-populated from counterparty returns. It provides fields for amendments to prior-period inward supplies and credit/debit notes, requires reporting of ISD credit distributions to recipients with tax-head breakdowns, and mandates an ISD ledger reconciling opening balance, ITCs received, reversals, distributions and closing balance, concluded by an authorised declaration and a monthly filing deadline.