ITR mismatch issue

This is a snapshot of my Form-1 ITR SAHAJ filled under Belated Return for AY 2021-22.

I get a Transport Allowance Deduction under Section-10(14)(ii), and also a Deduction under 80U. My Form-1 ITR SAHAJ shows the deduction under Section-10(14)(ii) being applied, but my ITR deduction under 80U is shown as Rs. 0 (RED text).

What is the reason?