• GSTR-1 amendment

Hi,  I have 2 questions.
I need to Amend  few  old invoices by increasing Taxable value for each invoices. But there is no way to Amend  Total HSN Wise summary value for outward supply. Which will create mismatch.

To be more specific.   say  In March GSTR-1   I am going to enter 5 new Invoice  in  in TABLE  6A    and  2  old modified invoices in Amendment table 9A.

Should I calculate HSN  wise total value  by considering all  5+2 = 7 invoices or  I should calculate   HSN value  only considering new ( 5 ) invoices .


2>> Regarding amendment of invoice:  Is it must to change Invoice number?. Consider the scenario where There is no change in invoice ..But during typing in portal  I entered  wrong amount. So I will just modify it now. Do I need to provide a NEW Invoice number in that case? I am planning to provide same old Invoice number in Amendment table 9A.

Please help.

Thanks