This is funny. Did the bank actually withdraw from Account A and deposit it back into Account A?
If the withdrawal and deposit is reflected on the bank statement, then just do:
Transfer
1) New > Create a Transfer
2) From > Account A
3) To > Account A
4) Enter Value
5) Save and Close
OR
Create a Cheque Payment
1) New > Supplier > Cheque
2) Bank Account > Account A
4) Add check number
5) Category: Account A
6) Enter Amount
7) Sales Tax: Exempt
Save and Close
