NashaLO -
Did those things you suggested and my release of Big Sur is up to date.
The issue seems to be with Amazon's build of TT 2020 Mac. It's dated Oct 2020, which is a much earlier patch level. They tell me it's all they have. But the problem is that it was probably built/released before Big Sur was released. Intuit should be offering customers with an Amazon serial number a newer build to download and use because Amazon's release won't likely change. Their 2019 release of TT also doesn't work any more (it did prior to Big Sur upgrade).
There's no way to update it because it simply will not launch after installing it to the Mac OS. So, it's stuck on the October 2020 build, and absolutely nothing happens when you launch the app. The icon bounces for a few seconds, and then nothing. There's not even any activity in my process monitor, and there's no error message of any kind.
I advise your internal support team get the Amazon copy of TT 2020 and test it on Big Sur. It won't work.
