YES IT IS POSSIBLE. I just had the same issue and searched for answers. This is what I did.
I googled "Turbo Tax Paid Version"
Went on this site: https://turbotax.intuit.com/personal-taxes/online/
Clicked on "Deluxe $60"
It asked me to log in
Clicked "Continue where I left off"
A messaged popped up saying "You are currently on Free version, do you wish to switch to commercial paid version?"
I clicked YES and all my info was transferred.
