Company or Partnership Application Form – Fillable PDF

Need to register a new company, LLC, or partnership with the Internal Revenue Service? The IRS Application for Employer Identification Number (EIN) – Form SS‑4 – is the official fillable PDF used by businesses of all sizes. With Formize’s built‑in PDF filler, you can complete the form directly in your browser, save a copy, and print or submit it without ever opening a separate PDF editor.

What Is This Application Form Used For?

Form SS‑4 is required when you:

• Start a new corporation, partnership, or limited liability company.
• Apply for an EIN for tax reporting, payroll, or banking purposes.
• Need a federal tax identification number for an existing entity that never obtained one.

How to Fill the Form Online with Formize

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, giving you a clean, user‑friendly interface to complete every field.

Common Mistakes & Tips for a Successful Submission

• Incorrect entity type: Choose the exact legal structure (e.g., Partnership, LLC, Corporation).
• Missing signatures: The form must be signed by an authorized officer or partner.
• Wrong tax year: Use the calendar year the entity begins operations unless you have a fiscal year.
• Blank required fields: The filler highlights required fields in red; don’t skip them.

Where to Send the Completed Form

After you finish, you can:

• Print and mail the PDF to the IRS address listed in the instructions.
• Fax the form to the appropriate IRS fax number.
• Submit electronically using the IRS Online EIN Application if you prefer.

Having a correctly completed Form SS‑4 speeds up the EIN issuance and lets you open bank accounts, hire employees, and file taxes without delay.