GSTR 1A auto drafted supplies reporting clarifies disclosure of outward supplies, SEZ zero rated supplies and debit/credit notes. GSTR 1A requires reporting of auto drafted supplies sourced from other GST returns, with separate tables for taxable outward supplies to registered persons (including reverse charge supplies), zero rated supplies to SEZ units or developers and deemed exports, capturing recipient GSTIN, invoice details, place of supply, rates, taxable value and tax amounts. It also requires reporting of debit and credit notes with original and revised document details and contains a verification declaration by an authorised signatory confirming accuracy and passing on any reduction in output tax liability.