Fillable IRS Form 945 – Annual Return of Withheld Federal Income Tax

Form 945, the Annual Return of Withheld Federal Income Tax, is required for employers and payers who withhold federal income tax from non‑wage payments such as pensions, gambling winnings, or backup withholding. Using Formize’s fillable PDF, you can complete this IRS form directly in your browser—no extra software, no downloads.

What Is IRS Form 945?

Form 945 reports the total amount of federal income tax you have withheld and deposited for the calendar year. It is filed with the Internal Revenue Service (IRS) by January 31 of the following year. Typical filers include businesses, trusts, and government agencies that make payments subject to backup withholding.

How to Complete Form 945 Online

Instead of downloading the PDF and opening it in a separate editor, simply click the "Fill out this form" button on this page. The Formize PDF Filler app will load in seconds, presenting a clean, fillable version of the official IRS document.

• All fields are clearly labeled and auto‑validated where possible.
• Save your progress at any time and return later using a secure link.
• When finished, download the completed PDF or print it directly for mailing.

Common Mistakes to Avoid

• Incorrect Tax Year: The form must reflect the calendar year for which tax was withheld.
• Missing Employer Identification Number (EIN): Double‑check the nine‑digit EIN; an incorrect number can delay processing.
• Wrong Total Withholding Amount: Use the sums from your quarterly deposits; rounding errors are common.
• Signature Errors: The authorized officer must sign the form; electronic signatures are acceptable when filing electronically.

Where to Submit the Completed Form

After you download the filled‑out Form 945, mail it to the IRS address listed in the form instructions, or file electronically through the IRS e‑File system if you are an authorized e‑file provider. Keep a copy for your records.

Need help? Review the official IRS instructions for Form 945 for detailed guidance.