I have had this capability on my website (www.mabspc.com) for the last month or so, but could not get it working correctly. Clients can now pay what they owe directly from my website by going to the Pay Your Bill page and clicking on the PayNow button. It is finally working correctly! The PayNow button takes you to a secure PayPal payment page where you can pay your bill safely and securely online! You must have a valid credit card in order to pay your bill online.
The payment page does not show how much you owe, but it does allow you to enter the amount you want to pay. You must enter your credit card information (including your name and billing address information for the credit card) in order to make your payment online.