Form 10b and itr

Akansha jain (CA) (156 Points)

31 May 2023  
for AY 2018-19 AND AY2019-20 form 10B was filed after ITR but form 10b was filed before due date .
AO disallowed exemption u/s11 and raised demand on the ground of late filing of form 10B.

is that right or wrong as form 10B was filed before it's due date?