TurboTax loads my return then starts over after a few seconds. Happens every time I log in.

I completed a very lengthy tax return with TurboTax & was all the way to the payment screen. I left my computer for enough minutes for the screen to log out, and when I returned to log back in, my return was still available on the screen. A few seconds later, it disappears and TurboTax goes back to the home screen of the very beginning. I log out and log back in, same issue. It appears & then starts over. I've tried relogging back in 5 times with the same insanity. 

I reallllyyyyyy do not want to go through the agony of entering every single piece of information again... Has anyone else had this issue?

How do I return to my progress?