The form on which a sole proprietor reports business income and expenses on the personal return.
Schedule C net profit is subject to both income tax and self-employment tax, and it is one of the most examined schedules because expenses are self-reported. Clean books, a separate business account, and receipts for anything over a few hundred dollars are what make it defensible.
Yes, one per business activity. Two unrelated income streams get two schedules.
Last reviewed September 10, 2026. Tax rules change; confirm current law before acting.
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