Don't Install TurboTax!
I've been a regular TurboTax user in the past few years, but I will never use their product again, after reading that they write to the boot track of your hard drive to store their copy protection crap!!! How on earth they can justify this is beyond me, but installing it means you run a very strong risk of destroying any boot loaders (such as LILO or Grub) that live in the boot track. I used TurboTax's web-based product last year, and probably will again this year, but I'm not about to ever install their Windows product again.