GSTR – 2A data will be auto-populated based on the data filed in GSTR – 1(outward supplies return filed by the supplier), GSTR – 6 (Quarterly return filed by the Input Service Distributor), GSTR – 7 (Monthly return filed by the Tax Deductor) & GSTR – 8 ( Monthly return filed by the tax collector at source (e-commerce operator) in various tables.