FAQs-Defective Return under Section 139(9) of the Income tax
Section 139 of the Income-tax Act, 1961 governs the filing of returns of income. Section 139(9) empowers the Income Tax Department to treat a return as defective where it suffers from specified omissions, inconsistencies, or non-compliance with prescribed requirements. A return treated as defective is not invalid by default; instead, the law provides the taxpayer an opportunity to rectify the defect within a prescribed time.
In practice, notices under section 139(9) are frequently issued for technical and procedural lapses—such as incomplete schedules, mismatches with audit reports, or incorrect ITR selection—rather than substantive tax evasion. This FAQ page explains the legal meaning, common defects, time limits, response mechanism, and consequences relating to a defective return under section 139(9), based on the Income-tax Act and official departmental practice.

Frequently Asked Questions-Defective Return
Key Takeaway
Section 139(9) serves as a curative provision, allowing taxpayers to correct procedural and technical defects in their returns without immediate adverse consequences. Most defective return notices arise from avoidable compliance lapses rather than substantive tax issues. Timely and accurate rectification ensures that the return remains valid and proceeds through normal processing.
Failure to respond to a defective return notice can have serious consequences, as the return may be treated as invalid, exposing the taxpayer to further assessment proceedings and statutory liabilities. Understanding the scope of section 139(9) enables taxpayers to treat such notices as an opportunity to regularise compliance and avoid unnecessary escalation.
Next steps
- See the Income Tax FAQs hub for more categories.
- Need the basics? Visit Computation of Tax — FAQs for heads of income, GTI vs Total, rebate 87A, surcharge and marginal relief.
- Read FAQs on Tax on Presumptive Taxation Scheme
- FAQs on Income Tax Return (ITR) Filling
- Business & Profession FAQs (India): Books, Audit 44AB
- Intimation Notice U/s 143(1): Meaning & Best Process Guide 2025
- Intimation Under Section 143(1) – Income Tax FAQs
- FAQs On Notice Under Section 143(2) – Income Tax – TaxbizMantra
- Best Judgment Assessment Under Section 144 – FAQs Income Tax
- Notice Under Section 142(1) – Income Tax FAQs-TaxbizMantra.com
Key official sources
- Frequently Asked Questions– Income Tax Department.
- INCOME-TAX ACT, 1961 – 2024
Disclaimer
This FAQ is for informational purposes only and does not constitute legal or professional advice. Tax positions should be evaluated based on individual facts and applicable law.

