Each taxpayer in the U.S. needs to have a unique nine-digit number that can identify them to the IRS. Many Americans use their Social Security number, or SSN, to confirm their identity on tax returns ...

A Taxpayer Identification Number (TIN) is a unique nine-digit number the Internal Revenue Service uses to identify individual taxpayers. A TIN can come in different varieties, including Social ...

If you live or work in the United States, the federal government has your number — but which kind depends on your residency status. If you live or work in the U.S., you’ll need either a Social ...

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 ...

A 9-digit number obtained from the IRS by a business with paid employees. If you're a sole proprietorship, your taxpayer ID number is your social security number. One of the first steps you will take ...

A Tax Identification Number (TIN) is required for all entities to file tax returns. Individuals use their Social Security Number (SSN) as their TIN for personal taxes. Businesses need unique TINs, ...

Companies, like people, are usually known by their names, but people and companies both have other types of identification, often issued by government agencies in the form of identification numbers.

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Ebony Howard is a certified public accountant and a QuickBooks ProAdvisor tax expert. She ...

ITIN Numbers are a good way for the IRS and other government agencies to connect to undocumented immigrants and other foreign nationals in the U.S. – and vice-versa. When it comes to the IRS and ...