Income tax return(urgent)

I FILLED ITR FOR THE A.Y. 2016-17 ON 12-FEB-2017, WHICH IS BELATED RETURN. NOW I FOUND THAT THERE WERE SOME EXPENSES CONSIDERED WHICH WERE NOT RELATED TO THE RELEVENT FINANCIAL YEAR DUE TO WHICH PROFIT BEFORE TAX WAS WORGLY CONSIDERED. TURNOVER FOR THE YEAR WAS 3067642/- AND PROFIT WRONGLY CONSIDERED COMES AT 243987/- (WHICH IS LESS THAN 8%), IF THE EXPENSES WERE CONSIDERD RIGHT PROFIT WOULD BE 248550/- (WHICH IS MORE THAN 8% OF TURNOVER),

PLEASE SUGGEST, IS THERE ANY WAY TO RECTIFY IT, IF YES, KINDLY POST THE STEPS.

THANK YOU FOR THE SAME