<h1>GST return framework: electronic common returns, auto population between GSTR 1/2/3, invoice matching, and automatic ITC reversal rules.</h1> The proposal establishes a common electronic GST return regime with self-assessment, separate return forms for distinct taxpayer categories, mandatory electronic Cash, ITC and Tax Liability ledgers, and payment as a prerequisite for valid filing. It prescribes sequential monthly/quarterly filing with specified cut off dates for GSTR 1, GSTR 2 and GSTR 3 to enable auto population and invoice matching, details contents required for each GSTR variant, mandates HSN/SAC reporting tied to turnover, provides a two day reconciliation window between counterparties, automatic reversal of unmatched ITC after two cycles, and allows revisions via debit/credit notes and supplementary documents.