Your best option is to delete (trashcan icon) the entry of Form 1099-MISC that is causing the error. Then go to your self-employment business and enter the information under Business Income. There is a specific interview question about 1099-MISC for Schedule C.
The easiest way to find any section of TurboTax Online, is to open your return, go to Tax Tools in the left column >> Tools >> Topic Search. Type in your topic, click the topic in the list and then GO to go directly to the start of that section. In TurboTax for Desktop, use the Search box or Show Topics.
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