check in your computation sheet for an income of 20565 or similer, which is STCG nature or sxome allowance which is is taxed over the limit of allownace permitted.
now the calculation comes as
GTI- 557865
adj* 20565
Net GTI- 537280
=============================================================
Now 80G allowed as50% of (10% cappiing over 537280) =26864
confirm the calculation by checking the computation plz