I am new with Quickbooks and QB online.

I have created accounts for Bank Charges in Chart of Accounts.  There are few properties using one bank account.  How do I record bank service charge?  It goes through Bank Charges and enter as an Expense but don't know how to handle CUSTOMER and CLASS.  This is bank charge so it has to be some kind of overhead.  Same thing with bank account interest, and bank account rebate, etc.

Thanks.