S. 22 : Income from house property-Annual value-Stock in trade-Construction business-Operation of sub-section (5) of section 23 inserted by Finance Act, 2017 is not made retrospective and, thus, annual value/deemed rental income of property held as stock-in-trade can be calculated and shall be chargeable to income tax only with effect from assessment year 2018-19 and not prior to that. [S. 23(4), 23(5)]