GST Reverse

11/01/2024 our bank deducted Rs. 20000 +3600(GST) =Rs. 23600 for Bank Charge Purpose and after that we haven taken  to  our GSTR 3B JAN,24 Return  Rs. 3600.00 INPUT purpose.

Dated 01/08/2024  bank refund this above amount with GST {i.e. 20000+3600(GST)=23600.00} which they deducted   from  us mistakenly dated 11/01/24

Now Our question is

(1)    For  the month of AUG,24 GSTR3B return we will reverse this GST Amount for Rs. 3600.00 ?

(2)    Interest will be charged for this GST amount reverse propose?