Form SS-4
Application for Employer Identification Number (EIN)
Application to request an EIN — the federal tax ID number required for businesses, nonprofits, trusts, and estates.
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About Form SS-4 — Application for Employer Identification Number (EIN)
Form SS-4 is the IRS application for an Employer Identification Number (EIN), also known as a Federal Tax Identification Number. An EIN is required for any business entity that hires employees, operates as a corporation or partnership, opens a business bank account, or files certain tax returns. Sole proprietors without employees may also obtain an EIN to avoid sharing their Social Security Number. You can apply for an EIN online at irs.gov for an immediate EIN, by fax (receive EIN within 4 business days), or by mail (4–5 weeks). The online application is available Monday–Friday, 7 a.m. to 10 p.m. Eastern time.
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Form SS-4 is an official form published by IRS. Official source
Related IRS Forms (Tax)
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The primary federal income tax return for individuals reporting wages, salaries, dividends, capital gains, and other income.
Tax Return for Seniors
Simplified version of Form 1040 designed for taxpayers age 65 or older with larger print and standard deduction chart.
Employee's Withholding Certificate
Completed by employees to tell employers how much federal income tax to withhold from each paycheck.
Request for Taxpayer Identification Number
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Nonemployee Compensation
Reports payments of $600 or more made to independent contractors, freelancers, and self-employed individuals.
Miscellaneous Information
Reports miscellaneous payments such as rent, prizes, awards, royalties, and payments to attorneys.