Prime numbers have fascinated mathematicians for centuries, yet many students find them intimidating. Whether you're preparing for competitive exams like JEE, solving number theory problems, or simply ...

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 ...

The phrase government-issued identification number is intentionally broad. Depending on the country and the situation, it may refer to a passport number, driver’s license number, social security ...

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 ...

Janet Berry-Johnson, CPA, is a freelance writer with a background in accounting and income tax planning and preparation for individuals and small businesses. Her work has appeared in Business Insider ...

A VIN — or vehicle identification number — is a 17-figure sequence of numbers and letters exclusive to your vehicle. It’s used by entities like the Department of Motor Vehicles, your auto insurance ...

An employer identification number (EIN) is issued by the Internal Revenue Service (IRS) to identify a business for tax administration purposes. It’s also used to complete some core business tasks, ...

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 ...