Taxpayer identification numbers (TIN) | Internal Revenue Service
A Taxpayer Identification Number (TIN) is an identification number used by the Internal Revenue Service (IRS) in the administration of tax laws. It is issued either by the Social Security …
Get a Federal and State Tax Id Number
A Tax Id number is also called an Employer Identification Number or EIN.
Get federal and state tax ID numbers | U.S. Small Business ...
Jun 6, 2025 · You can apply and receive an EIN immediately using the IRS assistance tool. It will guide you through questions and ask for your name, social security number or taxpayer ID …
Get an Individual Taxpayer Identification Number (ITIN) to ...
Dec 5, 2025 · Find out how to apply for an Individual Taxpayer Identification Number (ITIN) and use it to file your federal tax return.
How to Get a US Taxpayer ID Number: SSN, ITIN, EIN & More
Jul 23, 2025 · Confused about which US taxpayer ID number you need — SSN, ITIN, EIN, or something else? This guide explains each type, who qualifies, when it's required, and how to …
How to Find a Company's EIN (Free Methods + Lookup Guide)
Nov 14, 2025 · Where can I find the tax ID number for my business? A tax ID number, or EIN, is a unique nine-digit identifier issued by the IRS. Here's where to find it.
Taxpayer Identification Number: Definition, How to Get One ...
What is a tax ID number? A tax identification number, sometimes also called a "TIN number," is a unique nine-digit number that identifies you to the IRS.