You fill out Schedule C at tax time and attach it to or file it electronically with Form 1040. Schedule C is typically for people who operate sole proprietorships or single-member LLCs.

For example, sole proprietors who have self-employment income to report must complete a Schedule C form to declare ... by Jan. 31 each year. How do I get a 1040 tax form? The quickest way to ...

If you’re preparing your taxes, you'll file federal income tax Form 1040 ... You can think of the 1040 like a math worksheet: You plug in various numbers from a schedule (Form 1040 will tell ...