(3)When any sum payable under this section in respect of the income of such business or profession for the previous year in which the succession took place up to the date of succession or for the previous year preceding that year, assessed on the predecessor, cannot be recovered from him, the [Assessing Officer] [ Substituted by Act 4 of 1988, Section 2, for " Income-tax Officer" (w.e.f. 1.4.1988).] shall record a finding to that effect and the sum payable by the predecessor shall thereafter be payable by and recoverable from the successor, and the successor shall be entitled to recover from the predecessor any sum so paid.