GSTR – 2A is an auto-populated draft inward supplies return based on the supplier of goods or services filed through GSTR – 1 (outward supplies), GSTR – 5 ( filed by non-resident taxable person), GSTR – 6 (filed by input service distributor), GSTR – 6 (filed by Tax deductor at source) & GSTR – 7 (filed by a person collecting tax at source).