I am still learning to use my Quickbooks 2008.  How do I account for a fee for accepting credit card from a customer to apply to their invoice.  Example - Inv for $99, $97 applied to bank account, how do I get the $2 into the expense?  I have read the other answers and I don't have an option to add deposit in the 'make deposit' screen.  I am also unable to add expense to invoice.