Deductions to be made in computing total income
(1)
In computing the total income of an assessee, the deductions 30 specified in this Chapter shall be allowed from his gross total income, as per and subject to the provisions of this Chapter.
(2)
The aggregate amount of the deductions under this Chapter shall not, in any case, exceed the gross total income of the assessee.
(3)
If the deduction under section 133 or 135 or 137 or 138 or 141 or 142 35 or 143 is admissible in computing the total income of an association of persons or a body of individuals, no deduction under the same provision shall be made in relation to the share of income of a member of such association of persons or body of individuals while computing the total income of such member.
(4)
Irrespective of anything to the contrary contained in any of the provisions 40 of this Chapter under the heading “Deductions in respect of certain incomes”, where, in the case of an assessee, any amount of profits and gains of an undertaking or unit or enterprise or eligible business is claimed and allowed as a deduction under those provisions for any tax year,–– (a) deduction in respect of, and to the extent of, such profits and gains 45 shall not be allowed under any other provision of this Act for such tax year; and (b) shall in no case exceed the profits and gains of such undertaking or unit or enterprise or eligible business.