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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.

Get a list of IRS forms for corporations.

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

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.

A corporate officer and an electronic return originator (ERO) use Form 8879-CORP, E-file Authorization for Corporations, 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.

Use Form 8453-CORP, Form 8453-CORP, E-file Declaration for Corporations to authenticate an electronic Form 1120, U.S. Corporation Income Tax Return; Form 1120-F, U.S. Income Tax Return of a Foreign Corporation; or Form 1120-S, U.S. Income Tax Return for an S Corporation, authorize the ERO, if any, to transmit via a third-party transmitter, authorize the intermediate service provider (ISP) to transmit via a third-party transmitter if you are filing online (not using an ERO), and provide the corporation’s consent to directly deposit any refund and/or authorize an electronic funds withdrawal for payment of federal taxes owed.