You mean to transfer from 2017 online into 2018 Desktop program? Or for next year to transfer into 2019?
Transfer from Online into the Windows Desktop program. Expand the 3rd blue link
https://ttlc.intuit.com/questions/1901506-transfer-last-year-s-return-into-turbotax-for-windowsOne way is to start a 2018 Online return and transfer into that. Then you can download the .tax2018 file from online and just OPEN it in the Desktop program.
Do you need to buy the Desktop program?
Https://turbotax.intuit.com/personal-taxes/cd-download/
