Taxation · Provisions for filing Return of Income and Self Assessment

Return Filing Mechanics, Defective Return and Verification

Updated 5 October 2026

A return of income must be signed and verified by the person the Act specifies, such as the individual, Karta, managing director or managing partner, with a declaration that it is correct and complete. Companies and audited assessees file electronically. If a return has specified defects, the tax authority gives notice and 15 days to rectify, or it is invalid.

Understand Return Filing Mechanics, Defective Return and Verification

A return of income is a prescribed form in which you report your income, deductions, tax paid and tax payable for a tax year. The form must be prescribed, filled in the required particulars, and verified. Verification is a declaration that, to the best of your knowledge and belief, the return is correct and complete and the income is fully shown.

The Act also says who must sign and verify. This is a favourite exam area because the answer changes with the type of assessee. An individual signs for himself, but an HUF is signed by the Karta, a company by its managing director, and a firm by its managing partner. If the normal person cannot sign, the Act names a fallback person.

Most returns are filed electronically. E-filing is compulsory for companies, for persons whose accounts must be audited under the tax audit provision, and for other classes of persons as prescribed in the rules. This is not a complete list, so check the rules for the class of assessee in the question. Paper filing is limited to prescribed persons. After e-filing, you verify through a digital signature, an electronic verification code, or by sending a signed acknowledgement (ITR-V) to the Centralised Processing Centre within 30 days of e-filing. Where the rules require a digital signature, as for a company, you must use it. ITR-V is not open to every assessee.

A return can be defective. This happens when it does not carry the required attachments or proofs, or when tax, interest and fee due on the self-assessment basis have not been paid before filing. The tax authority must tell you about the defect and give you a chance to fix it, normally 15 days. If you fail, the return is treated as invalid, as if you never filed it. An unverified return is likewise invalid unless the delay in verification is condoned. If the return is treated as invalid and not furnished, consequences of non-filing such as late fee, interest and loss of carry forward of certain losses may follow.

Key rules to remember

Individual: who signs: Individual signs himself; if absent from India → a person duly authorised by him; if mentally incapacitated → guardian or manager; if for any other reason it is not possible for him to sign → a person duly authorised by him; The authorised person must hold a valid power of attorney. The power of attorney is attached to the return where the rules require it.
HUF: who signs: Karta; if Karta is absent from India or incapacitated → any other adult member of the HUF; A minor member cannot sign.
Company: who signs: Managing director; if not possible or no MD → any director; non-resident company → person with valid power of attorney; winding up → liquidator; Government-managed → principal officer; insolvency resolution → insolvency professional; A company return is filed electronically with a digital signature.
Firm and LLP: who signs: Firm → managing partner; if for unavoidable reasons the managing partner cannot sign, or there is no managing partner → any partner who is not a minor. LLP → designated partner; if for unavoidable reasons the designated partner cannot sign, or there is none → any partner (as the Act provides); State the reason the fallback person signs, as the Act allows it only in those cases. For a firm the fallback partner must not be a minor. For an LLP the Act's fallback is simply any partner, without the 'not a minor' wording used for firms.
Other persons: Local authority → principal officer; political party → chief executive officer; any other association → a member or the principal officer; any other person → that person or a person competent to act for him; Learn this as 'who runs the entity signs'.
Modes of verification: Digital signature | Electronic verification code | Signed ITR-V sent to CPC within 30 days of e-filing; An unverified return is invalid and treated as not filed, unless the delay is condoned. Verify promptly. Where a digital signature is required, as for a company, the other modes are not available.
Compulsory e-filing: Company; person whose accounts need tax audit; other classes as prescribed (the list is not exhaustive); Paper filing is limited to prescribed persons. Do not assume it is available to any assessee, and do not treat the first two classes as the only ones.
Defective return procedure: Notice of defect → 15 days (or longer if allowed) to rectify → if not rectified, return is invalid, treated as not furnished; If the defect is fixed after the time but before assessment, the tax authority may condone the delay at its discretion.

How to solve Return Filing Mechanics, Defective Return and Verification questions

Use this method for any question on signing, verification, e-filing or defective returns.

1Identify the assessee type: individual, HUF, company, firm, LLP, local authority, political party or other.
2Check the situation: is the normal signatory present, capable and available? If not, move to the fallback signatory for that type.
3Decide the mode of filing. A company, or a person under tax audit, must e-file. Paper filing is limited to prescribed persons.
4Name the verification route: digital signature, electronic verification code, or ITR-V to CPC within 30 days of e-filing. Note that a company needs a digital signature.
5If the question talks of a missing attachment or unpaid self-assessment tax, test for defect: audit report, proofs of tax paid, and tax, interest and fee paid before filing.
6State the procedure: notice, 15 days to rectify, invalid return if not rectified, and condonation of delay possible at the authority's discretion if rectified before assessment.
7Conclude with the consequence: a valid return, or an invalid return treated as never filed, with possible late fee and interest exposure.

Quickest way: Entity-to-signatory match and defect check

When to use it: Use this for MCQs and short written parts with 'who can sign' or 'is the return defective' in the question.

MCQs: match the entity to its signatory using Individual-self, HUF-Karta, Company-MD, Firm-managing partner, LLP-designated partner.
If the question says the main signatory is absent or incapacitated, pick the fallback: adult HUF member, any director, any non-minor partner or any partner of an LLP.
Eliminate options that allow a minor, an employee, or a chartered accountant to sign on behalf of an entity unless the question gives a valid power of attorney.
Defect MCQs: look for missing audit report, missing proof of tax paid or tax not paid before filing. If present, the answer is 'defective'.
Written answers: use the format Provision, Facts, Conclusion. Write the rule in one line, apply it to the facts in two lines, and end with one clear conclusion. Each part earns marks.

Common mistakes in Return Filing Mechanics, Defective Return and Verification

Letting any director sign a company return even when a managing director is available.
Students remember 'director' and forget it is a fallback.
Fix: Write the order: managing director first. Any director signs only if the MD is not able to sign for unavoidable reasons or there is no MD.
Saying a minor member can sign for an HUF or a firm.
Students ignore the word 'adult' or 'not a minor'.
Fix: Remember that the HUF fallback is an adult member and the firm fallback is a partner who is not a minor.
Treating e-filing as optional for all assessees.
Students know paper filing exists for some people and over-generalise.
Fix: State that e-filing is compulsory for companies and for persons under tax audit. Paper filing is a limited relief for prescribed persons, not the general rule.
Thinking a defective return is automatically cancelled.
Students skip the notice and rectification step.
Fix: Always write the order: notice, 15 days to rectify, and only then invalidity if the defect is not removed.
Forgetting that unpaid self-assessment tax, interest or fee makes the return defective.
Students link defects only to missing documents.
Fix: Add 'tax, interest and fee payable must be paid before filing' to your defect checklist.
Treating an unverified e-filed return as a valid return.
Students think uploading data is the end of the process.
Fix: Remember that verification completes filing. If ITR-V is not sent within 30 days of e-filing, the return is invalid and treated as not filed unless the delay is condoned.

Worked examples

Example 1

Sundar Traders Private Limited is a resident company. Its managing director is seriously ill and cannot sign the return of income for tax year 2026-27. Who can verify the return and how must it be filed?

Show the solution

The assessee is a company. The normal signatory is the managing director.
The facts say the managing director cannot sign because of illness. This is a case where the MD is unable to sign.
The fallback is any director of the company. So any director can sign and verify the return.
The company return must be filed electronically and verified with a digital signature.
The director signs the declaration that the return is correct and complete.

Answer: Any director of the company can sign and verify the return, since the managing director is unable to sign. The return must be e-filed with a digital signature.

Example 2

Mr Rao e-filed his return for tax year 2026-27 without paying the self-assessment tax due on his income. The tax authority sent a defect notice on 5 August 2027. He paid the tax and rectified the defect on 28 August 2027. The authority had not extended the time, and no assessment has been made. What is the position?

Show the solution

Provision: a return is defective if it does not meet the conditions specified in the Act and the rules. One such condition is that the tax, interest and fee payable on the self-assessment basis must be paid before the return is filed. Always check the defect conditions as the Act and rules specify them.
Facts: Mr Rao filed the return without paying the self-assessment tax due. This is a defect of the kind the Act specifies, so the return is treated as defective.
The notice was dated 5 August 2027. Fifteen days from that date ends on 20 August 2027. The authority did not allow any longer time, so 20 August 2027 is the last date.
Mr Rao rectified on 28 August 2027, which is after 20 August 2027. So he missed the 15 days.
Normally the return would then be invalid and treated as never furnished.
However, the tax authority has the discretion to condone the delay where the defect is rectified before assessment. Here the defect was rectified before any assessment, so Mr Rao can ask for condonation, but it is not automatic.
Conclusion depends on the authority's decision: if it condones the delay, the return stands valid. If not, the return is invalid and Mr Rao may face late fee and interest for non-filing.

Answer: The return was defective because the self-assessment tax was not paid before filing, and Mr Rao missed the 15-day period ending 20 August 2027. It becomes invalid unless the tax authority, in its discretion, condones the delay. Since the defect was rectified before assessment, condonation can be considered, but the outcome depends on that decision.

Exam tips

Learn the signatory table as pairs: entity → main signatory → fallback. Examiners swap the entity and ask who signs.
In a defective-return question, write the date arithmetic: notice date plus 15 days. Show it, because it earns step marks.
State the consequence in the final line: invalid return, treated as not furnished, and the possible effect on late fee, interest and loss carry forward.
Use only Income-tax Act, 2025 terms such as 'tax year' in your answer. Do not write 'assessment year'.
For MCQs, watch words like 'minor', 'employee' and 'if MD is available'. These words usually decide the correct option.

Practice questions from Provisions for filing Return of Income and Self Assessment

Return Filing Mechanics, Defective Return and Verification: frequently asked questions

Who can sign and verify the return of income of a company?

The managing director signs. If the MD cannot sign for unavoidable reasons or there is none, any director signs. Special persons sign in special cases, such as a liquidator for a company being wound up and a person with power of attorney for a non-resident company.

What is a defective return and how is it rectified?

A return is defective if it lacks required attachments or proofs, or if the tax, interest and fee due were not paid before filing. The tax authority informs you and normally gives 15 days to fix it. If you do not, the return is invalid and treated as never furnished, though the authority may condone the delay if you rectify before assessment.

Is e-filing of the return of income compulsory?

It is compulsory for companies, for persons whose accounts must be audited under the tax audit provision, and for others as prescribed. Paper filing is limited to prescribed persons. Check the current rules before assuming it is available.

How do I verify a return after e-filing?

You can verify with a digital signature or an electronic verification code. Or you can send a signed ITR-V to the Centralised Processing Centre within 30 days of e-filing. If you miss it, the return is invalid and treated as not filed unless the delay is condoned.