I have a client that worked at multiple 1099-NEC but in the same trade of business. Do I need to report multiple Schedule C?
One Schedule .C.
Total all the 1099-NEC income, and the rest that wasn't on a 1099, and report on Line 1 of the Sch C. Skip the 1099 input.
This seems to be where you are confused: "and the rest that wasn't on a 1099" is the guidance you overlooked at first.
Your taxpayer is supposed to report everything they made. Even if they got no 1099-NEC, you still have to do all the work and enter all the data in full. The 1099-NEC is an informational form that is sent because these customers paid your taxpayer $600 or more. Even if no one business paid your taxpayer at least $600, your taxpayer could have made $2 million, so the tax form you are preparing would include $2 million in this example.
And that revenue number is entered as gross.
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