Edit the item and checkmark the box on the left. Now you have an Expense account link and an income account link. Square is not a Customer; that isn't part of sales if it is a refund of your fee. You can enter that into the next blank line of the Make Deposit screen. CC charges are never added to Customer Sales; they are your option to accept processing by that service or agency. Your customer paid you in Full; You incurred that fee, not them, from Banking, not Sales. So, a fee you Incurred that reduces your Deposit means you use the next blank line in the Deposit scree to enter a Negative value posting to a Banking Fee Expense account, to end with a Net Deposit.