A tax identification number (TIN) is a unique nine-digit number issued by the Social Security Administration or the Internal Revenue Service to anyone who pays taxes (personal or business). Your TIN ...

As you prepare to file your taxes in advance of the April 15 deadline, you may be wondering about certain terminology. For instance, the 1040 form that most people use to file their federal income ...

What is a state tax ID number, and what is it for? A state tax ID number is sometimes called a state employer ID, state EIN or state tax registration. It’s assigned by a state to identify a business ...

It's not enough to register your business and acquire a federal tax identification number. You also need the right permits, licensing and tax registrations to be compliant with federal, state and ...

The U.S. taxes international corporations, foreigners living in this country -- resident aliens -- and foreigners based in another country doing work here -- non-resident aliens -- on income they earn ...

Ever tried filing taxes, opening a U.S. bank account, or applying for a loan and hit a wall because you don’t have a Social Security Number? That’s where a taxpayer identification number (or TIN) can ...

Individual taxpayer identification numbers, or ITINs, are used to differentiate and identify taxpayers who aren't eligible for a Social Security number. If you use an ITIN, take a moment to verify ...

Opinions expressed by Entrepreneur contributors are their own. Q: I want to start a new onlinebusiness and don’t really know where to start. Do I have to geta U.S. federal tax ID number? If so, where ...