Get your taxes done using TurboTax

But it shows you downloaded the .tax2017 file.  You downloaded and installed the 2017 Desktop program?  When you go to File-Open if it doesn't find the file there is a button to browse to where you saved it.

And After you get the program installed the first thing to do before you open your tax return is to update the program and install any state programs you had. Then open your file. So you first might need to start a fake return to be able to download the state program (go to File-New Tax Return).