Why returns are flagged defective
Common reasons include using the wrong ITR form, income that doesn’t match the TDS in 26AS, a missing schedule (such as not reporting a bank or business detail), or tax payable not paid. The system or an officer marks the return defective under Section 139(9) and asks you to fix it.
Acting in time
The notice gives a deadline — commonly 15 days — to respond by submitting a corrected return. If you don’t, the return may be treated as never filed (invalid), which can cost you the benefits of timely filing, such as loss carry-forward. You can request more time if needed. Read the stated defect carefully — it tells you exactly what to fix.
A worked example
Example: you filed ITR-1 but had capital gains, which ITR-1 doesn’t allow — so you get a 139(9) notice. You respond by filing a corrected return on the right form (ITR-2) within the window, and the return is accepted. Ignore it, and your filing could be invalidated. Our team can diagnose the defect and re-file correctly.