Recommended by IRS

About Form 1120-F, U.S. Income Tax Return of a Foreign Corporation

Information about Form 1120-F, U.S. Income Tax Return of a Foreign Corporation, including recent updates, related forms and instructions on how to file.

Form 1120-F PDF
PDF version of Form 1120-F.
Instructions for Form 1120-F PDF
Instructions explaining how to file Form 1120-F.

Tax year 2023 Form 1120 Modernized e-File (MeF) Assurance Testing System (ATS) information

The Tax Year 2023 Form 1120 Modernized e-File (MeF) Assurance Testing System (ATS) Information provides information to Software Developers and/or Transmitters about the release of scenarios for Tax Year 2023.
Software Development
Software Developers

Contact IRS for more information

Modernized e-file contact phone numbers
Software Development
Software Developers

Electronic filing options for business and self-employed taxpayers

Electronic filing and payment options for business and self-employed taxpayers
Software Development
Software Developers

E-help desk for tax professionals

Centralized toll-free number for the EPSS e-help Desk - assistors are ready to respond to questions and issues concerning e-products.
Software Development
Software Developers

Modernized e-File (MeF) overview

MeF is a web-based system that allows electronic filing of corporate income tax returns through the Internet.
Software Development
Software Developers