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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FAQs - IRC 41 QREs and ASC 730 LB&I directive (2017)
FAQs on the Guidance for Allowance of the Credit for Increasing Research Activities under IRC Section 41 for Taxpayers that Expense Research and Development Costs on their Financial Statements pursuant to ASC 730 (2017).
General Information