Publication 4520, Acceptance Agents' Guide for Individual Taxpayer Identification Number (ITIN)

Publication 4520, Acceptance Agents' Guide for Individual Taxpayer Identification Number (ITIN), provides guidance to agents authorized to assist alien individuals and other foreign persons in obtaining ITINs or EINs from the IRS.
Forms and Instructions
Tax Professionals

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

SOI Tax Stats - Calendar year projections, Publication 6149

IRS Publication 6149 contains multi-year projections of the number of tax returns to be filed with the IRS by state—as determined by the addresses on the tax returns.
About IRS
Individuals, 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

Where to file - Forms beginning with the number 4

Information for return forms beginning with the number 4.
General Information
Individuals