IRS Form 56F – Fillable PDF Fiduciary Notice

The IRS Form 56F (Fiduciary Notice) is used to inform the Internal Revenue Service of a fiduciary relationship for tax purposes. Whether you are an executor, trustee, or administrator, the form lets the IRS know who is responsible for filing tax returns on behalf of another person or estate.

What Is IRS Form 56F?

Form 56F is required when a fiduciary is appointed to manage the tax affairs of a decedent, an estate, a trust, or another taxpayer. It establishes a clear line of communication between the fiduciary and the IRS, helping prevent mis‑filings and potential penalties.

How to Fill Out Form 56F Online

Instead of downloading the PDF and opening a separate editor, simply click the "Fill out this form" button on this page. The Formize PDF Filler app loads directly in your browser, allowing you to:

• Enter information into each field with auto‑save.
• Upload supporting documents.
• Add an electronic signature that meets IRS requirements.
• Download, print, or email the completed form instantly.

Common Mistakes to Avoid

• Leaving fields blank: Every required box must be completed; otherwise, the IRS may reject the submission.
• Missing signature: Both the fiduciary and, when applicable, the person for whom you act must sign.
• Incorrect SSN/EIN: Double‑check the numbers to avoid processing delays.
• Outdated form version: Use the latest PDF (linked below) to ensure compliance.

Where to Submit the Completed Form

After you finish the online fillable version, you can:

• Mail the printed form to the IRS service center listed in the instructions.
• Fax the form if you have a fax number for the relevant IRS office.
• Submit electronically through the IRS e‑file system (if your tax professional supports it).

Download the Fillable PDF

For users who prefer a traditional download, the official fillable PDF is available below. It is the same document that powers the Formize online editor.

Download IRS Form 56F (PDF)