(4)Where the housing project is not completed within the period specified under clause (b) of sub-section (2) and in respect of which a deduction has been claimed and allowed under this section, the total amount of deduction so claimed and allowed in one or more previous years, shall be deemed to be the income of the assessee chargeable under the head "Profits and gains of business or profession" of the previous year in which the period for completion so expires.
