S. 43B : Deductions on actual payment-Employees contribution towards PF & ESI-Paid before due date filing of return-Allowable as a deduction-Amendment to provisions of sections 36(1)(va) and 43B vide Finance Act, 2021 were applicable prospectively in relation to the assessment year 2021-22 and subsequent years. [S. 2(24)(x), 36(1)(va), 139(1), 143(1)(a)(iv)]