Student
2282 Points
Posted on 28 April 2018
As per section 43B,
Certain payments should allowed to be claimed as deduction as an expense only in the year in which they have been paid and not in the year in which such expense has been incurred.
Sec 43B covers Payment of Taxes( Any sum payable by the assessee by way of tax, cess or fee under any law).
Hence you are not allowed to claim as deduction the amount of custom duty.