Try going back to the 1099-MISC input screen. To do that:
1.
Click Federal
on the left-hand side menu.
2.
Click Income
across the top.
3.
Scroll down to Self-Employment and click Show
more.
4.
Click Start
or Revisit by Income and Expenses.
Go through every 1099-MISC that you have, and make sure boxes 15 through 20 are blank.
It's possible, too, that the 1099-MISC was put in somewhere else besides your Schedule C. On the Income & Expenses side of Turbo Tax Self-Employed, you'll see Income from Form 1099-MISC. It could be there.