GSTR-1: monthly return for outward supplies GSTR-2: monthly return for inward supplies GSTR-3: monthly return containing details from other monthly returns filed by the taxpayer (GSTR-1, GSTR-2, GSTR-6, GSTR-7) GSTR-4: quarterly return GSTR-5: variable return to be filed by Non-Resident Taxpayers GSTR-6: monthly return to be filed by input service distributors GSTR-7: monthly return to be filed for Tax Deducted at Source (TDS) transactions GSTR-8: monthly return to be filed by e-commerce operators GSTR-9: annual return GSTR-10: final return to be filed when terminating business activities permanently GSTR-11: to be filed by taxpayers with a Unique Identity Number (UIN)