annual return

as per GSTR-1

as per books of accounts.. if there is any laibility then you can pay this by form DRC-03

Conclusion - if you not shown your supply as per your BOA then mismatch stand there ...

No, as per department instructions your annual return should be as per GSTR-1 and if there is any difference between GSTR-1 and BOA then amend your GSTR-1 as per BOA and show it in ''amendments in Currect financial year''.

in which column we show the amended figure in Gstr 9

Pt. V :- Particulars of the transactions for the previous FY declared in returns of April to September of current FY or upto date of filing of annual return of previous FY whichever is earlier.

10. Supplies / tax declared through Amendments (+) (net of debit notes)

11. Supplies / tax reduced through Amendments (-) (net of credit notes)