"Re: When the tax return file is saved in ProSeries software, the message shows "Protax19exe-Fatal Application Exit""

I see reports of a similar error for Lacerte, I didnt run across it being reported for ProSeries though.....Ive got the feeling an uninstall/rename/reinstall is in your future  https://proconnect.intuit.com/community/help-articles/help/uninstall-rename-and-reinstall-intuit-pro........but if this started right after updating, you may want to try using Repair Updates first, just in case that helps.  Close ProSeries and use Repair updates from the Windows Programs menu.