To record bank charges, first you have to create an account with the name of bank charges. For creation of account go to Accounting > Charts of account and click on new account and fill the details as shown in below image and save it.

Now you can record Bank charges via following steps:
Expenses > Record Expense > New Expense

ccount – Select the account from the drop down
Step 2: Expense Record Date- Select the date on which the bank charges are paid
Step 3: Select project – You can select if you want to group the transactions.
Step 4: Expense – Select Bank Charges from the drop down, enter the description, tax if any applicable and enter the amount.
Step 5: Attach a scanned proof (image or pdf document) – You can attach the bank charge receipt
Step 6: Narration – In case anything specific that needs to be mentioned
Step 1: Click Save