This is a REDUNDANT RULE. No deduction is allowable after AY 2005-06 & onwards. See subsection (1) of section 80-O (of Income Tax Act, 1961).
Form of certificate to be filed with the return of income for claiming deduction under section 80-O (of Income Tax Act, 1961).
The certificate referred to in second proviso to section 80-O (of Income Tax Act, 1961) shall be in Form No. 10HA.]