B2B declared as B2C

satish Motipalli (Student CA Final ) (119 Points)

07 March 2019  
Dear All,
In FY 2017-18 B2B supply declared as B2C supply. Now our customer asking for refund of tax amount because they are unable to take the credit. Now amendm such transaction now and is there any notification which allows ITC even though Same is not reflected in GSTR2A when we have valid tax invoice.

please help me in this issue