query rgarding amendment of gstr1

samirshaikh (Account executive) (35 Points)

18 April 2019  
Dear All,
my all returns are filed till March _2019. now one of my client is raised a query on me in gstr2a and asking me to amend GSTR-1 which was in aug -2017 FY-17-18 so my question is is it possible to amend my GSTR-1 of aug-2017 if yes then how plz suggest.

regards
Samir shaikh