Question

I'm a single dependent who made over 12550 as a server. I also made a little under $400 assisting dance classes. Do I have to file the $400 as self-employed income?

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Yes. Instruction for Schedule C state under Part 1 income:

"Be sure to report all income attributable to your trade or business from all sources."

It also states, "Line 1 Enter gross receipts from your trade or business."

The $400 threshold means that you will not be subject to SE taxes on the income.

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