REGARDING FILING IT RETURNS

ON MARCH 2015 I PAID ADVANCE TAX FOR RS 50000/-  FOR THE YEAR  2015-16 I SUBMITTED ALL  BANK STATEMENTS TO MY AUDITOR    . STILL MY AUDITOR NOT  FILED RETURNS . WHICH  IS THE LAST DATE FOR  FILING RETURN . I WANT  TO FILE  IN ONLINE . ALTHOUGH I AM  NEW ASSESSEE  . HOW CAN  MY PAST  TRANSCATION WILL BE CONSIDER . PLEASE GUIDE ME 

THANKING YOU