Got a proposed adjustment while your return was being processed (Section 270, old 143(1)(a)) — e.g. a mismatch with Form 26AS/AIS or a disallowed dedu...
Response to a defective-return notice (Section 139(9))A defective-return notice (old Section 139(9)) means something is missing/inconsistent in your filed return. Fix it within 15 days (or seek more time)...
Reply to a Section 133(6) information requestA notice under Section 133(6) (Section 252, Income-tax Act 2025) is a call for information — the officer wants details/documents about a transaction....