Income-tax Act amendment clarifies section 399 to reference section 427(1) and (2), effective 1 April 2026. Amendment of section 399 substitutes the reference '427' with an explicit reference to 427(1) and (2) in the Income tax Act, 2025, thereby directing the processing provision to those specific subsections; the amendment takes effect from 1 April 2026 and applies to the tax year 2026-2027 and onwards.