What is a tax ID number and who needs one?

[daisy]

I often hear about what a tax ID number is, especially when starting a business or filing taxes. From what I know, it’s a unique identification number used by tax authorities to track tax obligations. Businesses often use an Employer Identification Number (EIN), while individuals may use a Social Security Number. Can someone explain when a tax ID number is required?

 

[robertwilliam]

A Tax ID Number (TIN) is a special, government-generated number that identifies individuals and businesses to trace them in terms of taxes. It is a prerequisite of filing returns, paying taxes, and conducting official business.

 

[Oscar]

A Tax ID number is a unique identification number used by the Internal Revenue Service to track taxpayers. Businesses, employers, partnerships, and some individuals need it to file taxes, hire employees, or open business bank accounts.