One workaround that some of my clients have used is utilizing the Sales Tax Field for this purpose - if you don't currently charge Sales Tax. Instead, the credit card fee can be configured into a Sales Tax Code, and then the Customer can be predefined with the Sales Tax Code that applies to them. This will make the amount appear and calculate automatically on the Invoice Form, and then on the Forms Design for your Invoices, you can change the Description of the Sales Tax Field to instead read CC Processing Fee, or any other verbiage that you would like. Again, this only works if you do not already charge Sales Tax to your Customers. Otherwise, there is no other auto calculating field on Invoices. Please reach out to us if you would like assistance with setting this up, or for any other assistance with your Sage 50 accounting software. https://pcosupport.com 800-780-0700 or 954-961-0600.