# Form 1120

> Form 1120 — The federal income tax return of a domestic C corporation, filed every year whether or not it has taxable income — due the 15th day of the 4th month after year end, April 15 for a calendar year, with tax at 21% of taxable income under IRC §11(b).

Source: https://lopifi.com/glossary/form-1120
Part of: Lopifi — US GAAP books on autopilot, checked by a CPA (https://lopifi.com)

---

**What is form 1120?** In accounting, form 1120 means the federal income tax return of a domestic C corporation, filed every year whether or not it has taxable income — due the 15th day of the 4th month after year end, April 15 for a calendar year, with tax at 21% of taxable income under IRC §11(b).

## Words this system refuses for it

- the tax return unqualified
- Form 1120-S (an S corporation's)

- **Category:** Tax
- **Specified in:** [Lexicon](https://lopifi.com/md/docs/domain/11-lexicon)
- **Related:** c-corporation