Recommended by IRS
About Form, 1120 U.S. Corporation Income Tax ReturnInformation about Form, 1120 U.S. Corporation Income Tax Return, including recent updates, related forms and instructions on how to file.
Form 1120
PDF
PDF version of Form 1120.
Instructions for Form 1120
PDF
Instructions explaining how to file Form 1120.
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Form 1120, U.S. Corporation Income Tax Return
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.
Forms and Instructions
Instructions for Form 1120, U.S. Corporation Income Tax Return
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.
Forms and Instructions
About Form 1120, U.S. Corporation Income Tax Return
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.
General Information
Businesses
Form 1120-S, U.S. Income Tax Return for an S Corporation
Use Form 1120-S, U.S. Income Tax Return for an S Corporation, to report the income, gains, losses, deductions, credits, and other information of a domestic corporation or other entity for any tax year covered by an election to be an S corporation.
Forms and Instructions
Instructions for Form 1120-S, U.S. Income Tax Return for an S Corporation
Use Form 1120-S, U.S. Income Tax Return for an S Corporation, to report the income, gains, losses, deductions, credits, and other information of a domestic corporation or other entity for any tax year covered by an election to be an S corporation.
Forms and Instructions
Form 1120/1120-S/1120-F/1120-H e-file
Electronic filing of Form 1120/1120-S/1120-F/1120-H for corporations.
Software Development
Software Developers
Corporations
Find tax information for corporations including compliance, filing requirements, the examination process, FATCA, uncertain tax positions and e-file.
General Information
Corporations
Valid XML schemas and business rules for 1120, 1120-F, 1120-H and 1120-S Modernized e-File (MeF)
The following links provide information and technical guidance for software developers and transmitters who are interested in developing software for the Modernized e-File Forms 1120/1120S/1120-F and 7004. You will find the XML Schemas, technical documents, and late breaking news and announcements.
Software Development
Software Developers
S corporation employees, shareholders and corporate officers
The definition of employee for FICA (Federal Insurance Contributions Act), FUTA (Federal Unemployment Tax Act) and federal income tax withholding under the Internal Revenue Code include corporate officers.
General Information
Small Businesses
2024 valid XML schemas and business rules for 1120, 1120-F, 1120-H and 1120-S Modernized e-File (MeF)
2024 valid XML schemas and business rules for 1120, 1120-F and 1120-S Modernized e-File (MeF)
Software Development
Software Developers