Refund of accumulated input tax credit restricted to ITC reflected in GSTR 2B; circular clarifies undertaking, turnover and export refund rules Refund of accumulated Input Tax Credit under section 54(3) is restricted to ITC reflected in FORM GSTR 2B for the relevant tax period or earlier periods on which credit is available; this applies to refund claims for periods from January 2022 onwards. The undertaking in FORM RFD 01 is amended to remove references to section 42 and GSTR 2/GSTR 3, relating the undertaking solely to compliance with clause (c) of sub section (2) of section 16. Export related refunds and calculation of adjusted total turnover are clarified, and procedural amendments to Annexure A and portal categories are provided.