Reminder: Don't include Social Security numbers on publicly disclosed forms

Do not include personal identifying information in discloseable returns.
General Information
Charities and Nonprofits

Employer identification number

Find out if you need an employer identification number (EIN). Get one online, free from the IRS. Don’t pay for an EIN.
General Information
Small Businesses

Employer identification number

Review the requirements and process for obtaining an employer identification number for tax-exempt organizations.
General Information
Charities and Nonprofits

Adoption taxpayer identification number

Information for those needing a taxpayer identification number for a child who has been placed in their home pending final adoption.
General Information
Individuals

Taxpayer identification numbers (TIN)

Review the various  taxpayer identification numbers (TIN) the IRS uses to administer tax laws. Find the TIN you need and how to get it.
General Information
Nonresidents

Individual taxpayer identification number (ITIN)

An ITIN is a 9-digit number the IRS issues if you need a U.S. taxpayer identification number for federal tax purposes, but you aren’t eligible for a Social Security number (SSN). Find if you need one and how to apply.
General Information
Individuals

Employer identification numbers for tax-exempt organizations

Overview of EIN requirements and procedures for tax-exempt organizations.
General Information
Charities and Nonprofits

Taxpayer Identification Number (TIN) Matching

Apply to use the IRS Taxpayer Identification Number (TIN) Matching service. You can validate TIN and name combinations prior to submitting information returns.
General Information
Tax Professionals

Where to file - Forms beginning with the number 2

Find IRS mailing addresses to file forms beginning with the number 2.
General Information
Individuals

Where to file - Forms beginning with the number 3

Find IRS mailing addresses to file forms beginning with the number 3.
General Information
Individuals