After several unhelpful calls to TurboTax support, I made a Eureka discovery about this issue. I had exact same problem - TT 2022 could pull up my 2021 return file on initial screen but when I tried to “transfer return” - crickets. I did steps 1 and 2 of solution here, followed by reversing step 2 (because after step 2, my TurboTax files disappeared entirely because they were on the cloud (One Drive). After doing this, I was able to access and transfer 2021 return to 2022 TT. I figured out something the TT support staff could not.
https://www.cbackup.com/articles/cloud-file-provider-is-not-running.html#A1
