80GG deduction overlooked in ITR for AY 2017-18

CA CS NITIN MAHAJAN (CA ) (273 Points)

08 April 2018  
Sir, in the return for the Ay 2017-18,
I failed to claim the deduction under section 80gg for rent paid by my client as the time limit to revise the return has already expired can you tell me how to claim it return for the a y 17-18
can I go for rectification or any other option please guide
RETURN is under processing. No refund released till date