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SESK: Stuff Everyone Should Know · sesk.info/biz-c-corp-form-1120

Which federal income tax return does a C corporation file?

Form 1120, U.S. Corporation Income Tax Return.

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  1. Form 1065
  2. Schedule C
  3. Form 1120 ✔

Why: A C corporation is a separate taxpayer and files Form 1120. Partnerships file Form 1065, S corporations file 1120-S, and sole proprietors use Schedule C.

Huh, didn't know that: C corporations filing 10 or more returns of any type in a year must e-file Form 1120.

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References

Answer: Form 1120. A C corporation is a separate taxpayer and files Form 1120. Partnerships file Form 1065, S corporations file 1120-S, and sole proprietors use Schedule C.

  1. IRS: Forming a corporation www.irs.gov/businesses/small-businesses-self-employed/forming-a-corporation
    Income tax 1120, U.S. Corporation Income Tax Return
    Checked 2026-10-11.

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