A federal tax ID number, also known as an Employer Identification Number (EIN), is a unique nine-digit number assigned by the Internal Revenue Service (IRS) to businesses operating in the United States. It is used to identify the business for tax purposes and is required for various business activities, such as filing taxes, opening a business bank account, and hiring employees.
Obtaining an EIN is essential for businesses to operate legally and avoid penalties. It also provides several benefits, including the ability to open business bank accounts, establish business credit, and simplify tax filing.