If you used the Desktop program last year, see if you have another .tax2018 file on your computer.
Or maybe last year you marked the Schedule C as FINAL in Turbo Tax?
Here's an idea. Do you still have 2018 installed? Try opening 2018 program and see if you can get your 2018 return to show up in it. Go to FILE - OPEN. And see if your schedule C is in it and if it's marked as finally disposed. Or any Assets were disposed or sold.
Then save it again with a name and place you can find. Go to File - Save As. Then start a new 2019 return and transfer from the 2018 file.
