Income reported in box 7 is self-employment income. To claim it as otherwise will most likely result in a paper audit-by-mail.
Income reported in box 3 "could" be self-employment income. But it's for other things such as one time payment for prizes, awards, bonuses and other things like that.
To delete the SCH C work through the Business Income & Expenses section *AS* *IF* you desire to report self-employment income. Then on the screen that list the business name (whatever name you entered if any) click the DELETE button and work it through to delete the SCH C.
When entering the 1099-MISC pay attention to detail on each screen. The small print matters. All of it. Big time.
