Taxpayer Identification Number (TIN)
What is the Taxpayer Identification Number (TIN)?
How Does the Taxpayer Identification Number (TIN) Work?
TINs always begin with the number 9. Similar to IRS Individual Identification Number").
TINs are for tax purposes only; they do not replace Social Security numbers, authorize a person to work in the United States, or create eligibility for Social Security or other benefits. The IRS issues TINs regardless of immigration status because people both inside and outside the United States may have tax obligations to the United States under the Internal Revenue Code.