@Andrea1951 Are you on Windows or Mac? Sounds like it wants you to start a new 2019 return by transferring from 2018. Or make sure it launched the 2019 program and not 2018.
To open your return go up to File-Open.
Your tax return file ends in .tax2019. Search your computer for it. Check the Recycle Bin or Trash. Check in One Drive, etc. it should be in your Documents then in the Turbo Tax folder. Check your backups.
Find your Tax file in Windows
If you don't have the main .tax file you might have one that starts with a Tilde sign ~ like "~your name.tax2019". That file is if your computer crashes or your real file gets lost or deleted or corrupt so you can restore it.