I downloaded Mozillacontrol16.exe and installed it under wine ( February 2005)
and Fedora 1.
Tax cut now comes up normally and appears to be fully functional.
I will nonetheless probably actually use Windows to run tax cut for submission to the IRS. Eventually I hope to build a new computer with only fedora and no windows partition. Hopefully by that time wine will allow me to move all of my windows apps from my current machine and run under linux with wine.
That appears to be at least another year in the future .
R Nave