Get your taxes done using TurboTax

That wouldn't work for many reasons and no company can do that.  What if you needed to do a prior year return like for 2014?  Or needed to amend a prior year.  There are too many tax law changes eac year.  Each year is specific.  
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You could buy the download instead of the CD.  Then you can download it again and download it to computers that don't have a CD drive.  But you have to get the right download, Windows or Mac.  The CD has both Programs on it.