Reassessment Under Income-tax Act, 2025: Sections 279 to 286 Guide
A taxpayer guide to reassessment under the Income-tax Act, 2025, including notices, information review, timelines, and response preparation.
This guide is written for Indian taxpayers, founders, and finance teams navigating the Income-tax Act, 2025 and Finance Act 2025 changes. It is an educational readiness note — not a guarantee of any particular outcome, and not a substitute for professional advice on specific facts. Always anchor the response position to the official portal, notified forms, and the taxpayer's own documents.
What changed with the new Act
Reassessment under sections 279 to 286 of the Income-tax Act, 2025 is not a catch-all notice category. Each notice arrives with a specific year, a specific section, and a specific allegation of information that the department believes has escaped assessment. Treating it as a generic communication is where taxpayers go wrong.
| Point | Practical meaning |
|---|---|
| 1 | Reassessment response should start with notice identification and timeline. |
| 2 | Information relied on by the department should be matched to records. |
| 3 | Old-period reassessment needs careful law and year tagging. |
The Income-tax Act, 2025 brought a restructured set of reassessment provisions. Taxpayers dealing with notices issued under this framework — particularly sections 279 to 286 — need to pin down the assessment year the notice refers to, the legal section cited, the alleged escaped income, and the deadline for response. Each of these elements shapes the response strategy.
Why the transition creates confusion
A taxpayer in June 2026 may simultaneously be dealing with an AY 2026-27 original return, a Tax Year 2026-27 advance tax or TDS obligation, a notice under the Income Tax Act, 1961 for an older year, and a reassessment notice issued under the Income-tax Act, 2025 framework. These are separate matters governed by different rules, and they should be handled separately.
The year-selection problem is real. Old notices and new forms can land in the same inbox within the same week. A clean response file should show the period, the law reference, the portal form or response route, the payment or return type if one is needed, and the supporting evidence — all clearly labelled.
Practical example
A taxpayer receives a notice citing unexplained bank credits for an earlier assessment year under the Income-tax Act, 2025. The right sequence: read the notice carefully to identify the section and the alleged information; pull the bank statements covering that period; trace the source of the credits; check whether those amounts appear in the original return for that year; prepare a response note with the supporting documents before submitting anything through the portal. Responding without documentation is rarely useful.
Records to keep
Assemble these before preparing a response:
- The notice copy, including the section cited and the response deadline
- Details of the information the department is relying on
- The original return acknowledgement for the relevant year
- Bank statements and transaction source documents
- Any prior correspondence or assessment orders for that year
- The response filed, along with the portal acknowledgement
Step-by-step checklist
- Identify whether the reassessment notice affects AY 2026-27 filing, Tax Year 2026-27 compliance, or a prior year — and keep those threads separate.
- Read the official source material and map the section to your income head, taxpayer type, and the dates involved.
- Collect source records, computation notes, challans, statements, and declarations before filing or making any payment.
- Determine whether the response changes the ITR form, schedule, tax payment route, TDS/TCS position, or disclosure requirement.
- After the response or return is submitted, preserve the acknowledgement, e-verification proof, and all working papers.
Official sources
| Reference | Link |
|---|---|
| Income Tax Department - Reassessment under 2025 Act | Open source |
| Income Tax Department - Income-tax Act, 2025 PDF | Open source |
| Income Tax Department - New Act transition FAQs | Open source |
Common mistakes to avoid
- Using a familiar old form number without verifying the current official form for the year in question.
- Mixing AY 2026-27 original filing records with Tax Year 2026-27 payment or TDS records.
- Treating a newspaper headline about a slab, rebate, or threshold as a final computation basis.
- Filing or paying before reconciling AIS, Form 26AS, challans, books of account, and TDS certificates.
- Not preserving the official source and computation note that supported the filing or response position.
Frequently asked questions
Is this guide a substitute for filing advice?
No. It is an educational readiness note. Where facts involve material amounts, residency questions, complex transactions, or contested notices, get case-specific CA review.
Should I rely only on prefilled portal data?
No. Prefill is a useful starting point, but the return or response position should always be cross-checked against Form 16, AIS, Form 26AS, bank records, books, broker reports, challans, and working papers.
What should I preserve after taking a position?
Keep the official reference or notice, your computation note, supporting documents, the portal submission acknowledgement, challans if tax was paid, and any professional review note — all in one organised folder.
How MyeCA helps
MyeCA helps taxpayers and businesses organise records for reassessment responses, compare the notice facts against AIS and return data, flag tax-credit mismatches, and decide when a CA-led review is the right step before responding or making payment.
Final checklist
Before submitting any response: confirm the year; read the notice section and the alleged information; collect supporting documents; prepare a short explanation note; check whether payment or return filing is required; and preserve the acknowledgement proof once the response is submitted.