TurboTax has known about this problem for over a couple of months now. After my grappling with this white screen problem for a couple of weeks, the crunch hit on the weekend. I read through this thread, tried most of the suggestions with no success, spent about half an hour on the phone with TurboTax tech support (the guy thought he had solved my problem, but he hadn't). I had to get some tax decision-making done, and so chose to switch to Wealthsimple Tax, and had great results, easily and quickly. Not coming back to TurboTax. They've lost my trust and my business.
