I decided to uninstall and reinstall Premier 2019. Of course, when I tried to uninstall, I received the 1648 error and could not uninstall turbotax 2019. I looked at Microsoft errors for uninstall and 1648 and ran their tool to correct the uninstall problem:
https://support.microsoft.com/en-us/help/17588/windows-fix-problems-[product key removed]ams-being-i...
Then reinstalled TurboTax 2019 Premier. It updated everything without a problem.
