A assesse has timely filed returns(ITR3) for AY2017-18, submitted ITR-5 to CPC Bangalore, eventually he is served notice u/s139(9) by CPC to RECTFY DEFECTS, while doing so, assessee OBSERVES lots of MISTAKES(on his part) in ITR3 (in his mentions/calcualtions) , will it be OK? if, he files a REVISED ITR3 or only he is ENTITLED to CARRYOUT corrections for DEFECTS SHOWN in notice u/s139(9)?