Hi. You might have the following situation.
1) You have a 1099-Misc -- The IRS considers that self-employment.
2) Your last year's return had a 1099-Misc and it transferred over to 2018.
If that's the case search 1099-Misc then click the jump to link on where to enter the 1099-Misc part of the program. That section is also where you can delete it.