jashwanth (vijayawada) 24 May 2020
Generally amendments in GSTR 1 and GSTR3B for previous financial year can be made
1.upto september month return of the following year (or)
2.Annual return filing
which e4ver is earlier.
so in this case for FY 2017-18 Otion for amendment has been given till 31-03-2019 . So now ur not having any option for amendment in Gstr1.So client can claim input on th basis of invoice , and he can give explanation to dept in case of any issue , Tax amount has been paid by supplier but under the B2C.