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Information about Form 1120, U.S. Corporation Income Tax Return, including recent updates, related forms and instructions on how to file. Use this form to report the income, gains, losses, deductions, credits, and to figure the income tax liability of a corporation.

Domestic corporations use Form 1120, U.S. Corporation Income Tax Return, to report their income, gains, losses, deductions, credits and figure their income tax liability.

Domestic corporations use Form 1120, U.S. Corporation Income Tax Return, to report their income, gains, losses, deductions, credits and figure their income tax liability.

Find out what takes place in the formation of a corporation and the resulting tax responsibilities and required forms.

Get a list of IRS forms for corporations.

Electronic filing of Form 1120/1120-S/1120-F/1120-H for corporations.

Information about Form 8453-CORP, E-file Declaration for Corporations, including recent updates, related forms, and instructions on how to file. Form 8453-CORP is used to authenticate an electronic Form 1120, authorize an ERO or ISP to transmit via a third-party, and authorize a corporation's consent to direct deposit any refund or electronic funds withdrawal for payment of federal taxes owed.

Information about Form 8879-CORP, E-File Authorization for Corporations, including recent updates, related forms and instructions on how to file. A corporate officer and an electronic return originator (ERO) use this form when the corporate officer wants to use a personal identification number (PIN) to electronically sign a corporation’s electronic income tax return and, if applicable, consent to electronic funds withdrawal.

Form 1120-POL – Final Return (527 organizations).

Overview of information reported on Form 1120-POL.