how to process customers credit card payments on our desktop

Hey there, UMTRADEHOUSE.

I appreciate you reaching out to the Community for support. I'd be happy to guide you in the right direction.

QuickBooks Desktop offers various features that can help make running your business easier. One of these options is called Payments. This feature allows your customers to pay directly from the invoices they receive. I recommend taking a look at this article as it will provide information on how to proceed. 

If you have any other questions, feel free to reach back out.