The only way to transfer is to start over with a new blank return. But a pdf only transfers your name and basic personal info and the AGI. And you might not be able to transfer from a Turbo Tax pdf. You only saved the pdf? You didn't make a backup of the .tax2019 file?
Transfer pdf to Windows Desktop
https://ttlc.intuit.com/community/entering-importing/help/transfer-last-year-s-return-to-turbotax-fo...
