Can I switch from cd (software) partially completed to turbo tax online. Meaning, can I upload a .tax2019 file already filled out?

No.  A 2019 tax data file cannot be uploaded to the 2019 online tax returns.

Thank you for the response, I see that one could upload last years (2018) tax file and was hoping that I would be able to upload this years so I would not have to re-enter the info.

I purchase turbotax from Amazon and dowloaded on desktop.  Trying to move it to my TT intuit account.  Can this be done either before or after I file my return?

IT Is crazy that turbo tax appears to just post the questions but no answers.