there is no app that can open every year's .tax YYYY file. each year stands on its own.
"I have all my old TurboTax files which were CD downloads". if you are referring to the apps, only 2017-2019 can be reinstalled and updated. years prior to that can be installed but can't be updated nor are state returns available for those years. for example, if you were to reinstall 2016 and open the .tax2016 file the numbers could very easily change from what was actually filed.
with the desktop software, the only place the .taxYYYY files exist is on your computer. so did Geek Squad bring them over to the new computer? id f so, where did they put them? the normal place is in the Turbotax document folder but it probably didn't exist on the new computer.
