how do i find my state employer identification number

Determine if you need an employer identification number (EIN) and apply using the interview-style online EIN application. It's important to note that along with an EIN, certain states also require companies to obtain a state tax identification number. Learn more. Get more details. An Employer Identification Number (EIN) is also known as a Taxpayer Identification Number (TIN). A sole proprietorship that has no employees and files no.