Required to reply for above notice by furnishing ASMT-11 : Either accept the discrepancy & deposit the tax, interest or any other amount payable in relation to Notice received or furnished the explanation for the discrepancy.
As per Section 61(2) R/w rule 99(2), if the explanation given is found to be accepted then no further action is taken in this regard .
Unnless initiate appropriate action including under Section 65 or Section 66 or Section 67, or proceed to determine the tax and other dues under Section 73 or Section 74.