)
or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.
What this notice is about
You filed an untimely Form 1120‑F (U.S. Income Tax Return of a Foreign Corporation). Failure to file Form(s) 1120-F on time may result in the corporation being ineligible for deductions and credits. The notice is informational only—it is not an audit or examination letter, so you are not required to reply.
What you need to do
Confirm that all U.S. filing obligations are satisfied – Review your relevant business activities in the United States to ensure all required United States filings, including Form(s) 1120-F, are complete and correct. Take all actions to remedy any non-compliance with your reporting.
Correct any gaps or errors – If you discover that other required filings are missing or contain mistakes, file the missing returns or amended returns as soon as possible.
Consider a waiver for the late filing – For future reference, it’s possible to request a waiver from the IRS. The process is outlined in Treasury Regulation 1.882-4(a)(3)(ii). To qualify for a waiver, a foreign corporation must demonstrate that it acted reasonably and in good faith when failing to file a timely Form 1120-F, including a protective return. We require the corporation’s cooperation throughout the process of determining its income tax liability to consider granting a waiver.
Frequently asked questions
Notice CP121 is an educational notice sent to taxpayers who may not have timely filed Form 1120-F, U.S. Income Tax Return of a Foreign Corporation.
You received Notice CP121 because our records indicate you may have filed a late Form 1120-F, U.S. Income Tax Return of a Foreign Corporation.
No. Notice CP121 was sent to you for education purposes only, and is not a notice of examination. You are not being audited by the IRS.
You are not required to respond to this notice.
Do not provide any information in response to this notice. Review your relevant business activities in the United States to ensure all required United States filings, including Form(s) 1120-F, are complete. Please make any necessary corrections as directed per IRS forms, instructions, or other published guidance.
Helpful Information
Follow the links below to read more about the Form 1120-F, U.S. Income Tax Return of a Foreign Corporation.