GST Practitioner & Accounts
15079 Points
Joined March 2014
As per section 34 of the CGST act 2017
In first case Supplier Mr X will issue Credit Note of difference amount
In second case supplier Mr X issue Debit Note of difference amount
In GSTR 1 supplier will show in Table 9B
In GSTR 3B supplier will show as - Value of Taxable supply = Value of Invoice + Debit Note - Credit Note