I may have found a solution to this. Here's what I did. I switched off Wi-Fi on my Laptop and turned it back on. I reconnected and proceeded to make the payment. I did this over and over each time it froze until I got further and further into the process. While entering my address it froze again, I reconnected, but it remembered everything I had entered so I didn't loose anything. Then on the payment page, I entered my credit card info. and made the payment. I waited 30 seconds or so for the payment to register and proceeded to file my taxes. Again, the trick that worked was every time it froze, turn off your Wi-Fi and turn it back on until it starts connecting again.
