Hi, Carissa --
Thanks for your response. I won't repeat my previous post. I believe the Mac file naming occurred during the setup of my 2021 TT Premier edition, when the previous year's data files are transferred into the 2021 software. I don't know why this occurs; it has not in previous years. I am tempted to delete all of the Mac-named versions to see if I can eliminate the problem, loading only the Windows-based versions created by my wife's Windows laptop.
Again, thanks!
