Hello @mdiamond1996,

Thank you for dropping by here in the Community. Let me share some clarification about the payments in QuickBooks Desktop.

The convenience fee beta feature allows the system to calculate and add the amount automatically. We're unable to continue to roll it out in this format due to requirements from the card brand network.

As of now, the option or ability to enable the feature in the Desktop version is unavailable. As a workaround, I recommend adding the convenience fee as a line item on an invoice manually.

Here's how to create an item:

1. Go to the Lists menu.
2. Select Item List.
3. Click on the Item drop-down.
4. Choose New.
5. Pick Other Charges from the item type drop-down list. 
6. Enter the necessary information.
7. Click on OK once finished.

Once done, you can add it as a line item to your invoice for the fee. If you need more information about how to create an invoice, I suggest checking out this link: Create an invoice in QuickBooks Desktop.

Alternatively, you can search for third-party applications that will help you with the fees. Though I can't suggest which one to use, check out our QuickBooks Apps Store for integrated software.

Additionally, I recommend visiting the following article to learn how to prepare payments for open invoices, as well as some details about deposit times for customer payments: Receive and process payments in QuickBooks Desktop.

Drop me a comment below if you have any other questions related to processing customer payments in QuickBooks. I'll be happy to help you some more.