If you don't receive a 1099-Misc to report your Self Employment Income, you can still enter your income.
Type 'Schedule c' in the FIND window, and 'Jump to schedule c'.
If you have already started entering info for your Business, EDIT your Business. If not 'Add Another Business' to get started.
TurboTax asks a few questions about your Business. Continue until you see 'Enter Business Income That's Not on a 1099-Misc' (screenshot).
In FORMS mode, you can make Schedule C entries directly on the form, too.
Click the link for detailed info on Reporting Self-Employment Income and Expenses.
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