CA in Practice
1340 Points
Joined September 2013
GSTR-3B you cannot change, ensure the tax amount is entered correctly in GSTR-3B.
In GSTR-1, you can change through amendment table i.e.Table 9.
In the subsequent month GSTR-1 in table 9 select respective invoice, the details would be autopopulated. You can change the taxable value.