Its effing frustrating. We can accept swiped cards for payment invoices but it is a pain in a__ to do this because of all of the steps involved. As you found out QBO desktop does not support quickbooks card reader even though the reader has a cable port. Only stupid mobile app thru bluetooth. Not one idiot at QBO Chat or support could give a reason onto why this switch happened. One day credit cards can be swiped for Sales receipts and the next day no. Like all communication from this s*** company-- there was no communication.