The only way is from the 2017 program. Do you still have 2017 installed? Try opening 2017 program and see if you can get your 2017 return to show up in it. Go to FILE - OPEN. Then save it again with a name and place you can find. Go to File - Save As.
The .tax2017 data file should be in your Documents then in a Turbo Tax folder. Or search your whole computer for all files ending in .tax or .tax2017. And check your Recycle Bin. Are you on Windows 10? That can move files to different spots like to One Drive. Or to Drop Box. Check your backups. Could it be under a different user on your computer?
