Make sure this is setup correctly.   Must be in a separate class so that is shows separate in reports. Normally would be a minor class called "cc service charge".  That minor class would be under major class of "Misc" or "Non-sale".   It is NOT a non-sale item itself so do NOT check the box that says Non Sale Item.  Also, it does not have any tax assigned to it.   Normally the % will be set @ 4.2 to 4.4 (For the item itself that means .0042 or .0044).  For locations that have a higher level of tips than normal, adjust according (4.5, 4.6, etc.)

Note the itemID of the menu item.  This number needs to be placed in the System Table in the column: upchargeMenuID

Normally name the item: "Credit Service Fee".   Alternately, if the customer desires something more generic, put "Cust Serv Fee"