Don't know for sure what the issue is...but really , it's not worth the effort..
Pulling in last year's PDF only transfers names, SSN's and AGI, and not much else.....
IF you used TTX last year, you really need the .tax2019 datafile to get any significant amount of information transferred,.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
