We want to made some changed in our GSTR1 of FY 2017-18, Now we are filling our GSTR1 of Q4 FY 2018-19 in this return we are trying to make changes under B2B Amendment (FY 17-18 Cases), but it is showing error of Documents details pertaining to Previous Financial Year can't be amended.
as per our knowledge the last chance of made amendment of FY 17-18 invoice is Mar 19 (31 Mar 19)