Section 25A of Income Tax Act "Special provision for cases where unrealised rent allowed as deduction is realised subsequently"
25A. (1) The amount of arrears of rent received from a
tenant or the unrealised rent realised subsequently from a
tenant, as the case may be, by an assessee shall be deemed
to be the income from house property in respect of the
financial year in which such rent is received or realised,
and shall be included in the total income of the assessee
under the head "Income from house property", whether the
assessee is the owner of the property or not in that
financial year.
(2) A sum equal to thirty per cent of the arrears of rent or
the unrealised rent referred to in sub-section (1) shall be
allowed as deduction.
25AA. Unrealised rent received subsequently to be charged to income-tax.-Where the assessee cannot realise rent from a property let to a tenant and subsequently the assessee has realised any amount in respect of such rent, the amount so realised shall be deemed to be income chargeable under the head "Income from house property" and accordingly charged to income-tax as the income of that previous year in which such rent is realised whether or not the assessee is the owner of that property in that previous year..