GST B2C TO B2B AMENDMENT


(Guest)
Dear tax advisor, Please help to clear my doubts we sold the goods to our customer on 7/04/2021 he is do not have GST NO at the time so that we filed the GST return B2C after few days he got the GST no which is valid from 30/04/2021 shall I amend or not because at the time of billing he does not have GST no please guide me