CBDT FAQ Deep-Dive Series #7: Section 43B Actual-Payment Deductions and the 43B(h) MSME Disallowance Under the Income-tax Act 2025 – How Section 37 Maps the Transition Before the September 30, 2026 Tax Audit

Section 43B becomes Section 37 of the Income-tax Act 2025 and 43B(h) becomes Section 37(2)(g). Period-aware guide to the MSME disallowance for the 30 Sept 2026 tax audit.

FY 2025-26 Tax Audit Practitioner Sprint Under Section 44AB of the 1961 Act and Section 536 Sub-Clause 4 of the Income-tax Act 2025: Form 3CD 41-Clause Hot Spots, Section 43B(h) MSME Disallowance, Section 40(a)(ia) TDS Reconciliation, Section 271B Penalty, and the September 30, 2026 Ten-Step Sprint Plan

Practitioner advisory on FY 2025-26 tax audit compliance under Section 44AB of the 1961 Act, preserved by Section 536 sub-clause 4 of the Income-tax Act 2025. Form 3CD 41-clause map, applicability thresholds (Rs 1 crore vs Rs 10 crore cash-test proviso, Rs 50 lakh profession), Section 43B(h) MSME interest disallowance, Section 40(a)(ia) TDS-default disallowance, Section 271B penalty grid with Section 273B defence, and a ten-step May-to-September sprint plan.