IRS Form SS‑4 – Tax Form Application (Fillable PDF)

IRS Form SS‑4 is the official application used to obtain an Employer Identification Number (EIN) for businesses, trusts, estates, and other entities in the United States. This tax form application is required for filing taxes, opening bank accounts, and conducting many other financial activities.

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What Is IRS Form SS‑4?

Form SS‑4 collects essential information about the entity applying for an EIN, including legal name, mailing address, type of entity, reason for applying, and the responsible party’s details. The IRS processes the form and issues the EIN within minutes when submitted online.

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Step‑by‑Step Guide to Complete the Form

Follow the simple steps below to finish your tax form application quickly.

Common Mistakes to Avoid

Entering an incorrect legal name, leaving the "Reason for applying" field blank, or forgetting to sign the form are frequent errors that can delay EIN issuance. Double‑check each section before saving.

Where to Submit Your Completed Form

After completing the form, you can:

• Download the PDF and fax it to the IRS.
• Upload the file through the IRS online EIN portal.
• Mail the printed form to the address listed in the instructions.

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