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171 provisions mapped from official sources. The full Act has 536 sections — more mappings are being added.

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s. 139s. 263·Return of income
Procedural Change
What this means for you

The compliance process has changed — timelines or procedures may differ. The substantive law remains the same, but you should update your filing procedures for AY 2026-27 onwards.

Compliance affected
Relevant for:Tax Professionals
ITA 1961 — Section 139
Source-checked

Section 139 (1961 Act — governs AY 2026-27 returns), as amended by Finance Act 2026 s.5 (from 1 Mar 2026): Explanation 2 due dates — 31 July (others), 31 August (non-audit business/profession and qualifying partners), 31 October (companies, audit cases, qualifying partners), 30 November (transfer pricing). Belated return (139(4)) by 31 December 2026; revised return (139(5)) by 31 March 2027 (or before assessment completes, if earlier). Updated return (139(8A)) not re-checked.

ITA 2025 — Section 263
Source-checked

Section 263 (2025 Act, as amended by Finance Act 2026; from Tax Year 2026-27): 263(1)(c) due-date table — 31 July / 31 August / 31 October / 30 November, subject to exact conditions. Belated return within 9 months from end of the tax year (263(4), retained); revised return within 12 months, or before assessment completes if earlier (263(5), amended).

What Changed
AI Summary

139 → 263. For AY 2026-27 the old-Act dates were amended by Finance Act 2026 (non-audit business/profession: 31 Aug; revised: 31 Mar 2027). Under s.263 the revised window was amended to 12 months; the 9-month belated window was retained. Other sub-rules: not checked.

Verdict

Compliance process, forms, or timelines changed; substantive rights/obligations unaffected.

ITA 2025 — Section 263Read on official site
Source:Finance Act, 2026 (Act No. 4 of 2026) — Gazette(Official Gazette)· Source checked 25 Sep 2026 (AI-assisted); professional review pending. Checked: 139 → 263(1)(c), 263(4), 263(5): Old s.139(1) Explanation 2 due dates, 139(4) belated and 139(5) revised deadlines for AY 2026-27 as amended by Finance Act 2026 s.5 (from 1 Mar 2026); new s.263(1)(c) due-date table, 263(4) belated (9 months, retained) and 263(5) revised (12 months, amended). Other sub-rules not checked.Medium confidenceView source