Can i retrive 2017 taxes from turbo tax. my other computer crashed which has 2017 taxes stored.

Turbo Tax keeps your past filings.  You need to log into TurboTax online and pick past years in the left menu.  You should be able to read and print

You can only retrieve a copy of your taxes if you saved a backup copy.  I suggest saving a copy of the .tax file as well as a copy of the return