For most individual taxpayers, their SSN is their TIN. SSNs are issued by the Social ... To apply for your ITIN, complete IRS form W-7, "Application for IRS Individual Taxpayer Identification ...

A Tax Identification Number (TIN) is required for all entities to file ... An ITIN application, Form W-7, can be mailed to the IRS or presented in person at an IRS service center.

A tax identification number (TIN) is a nine-digit number used by the Internal Revenue Service (IRS) to identify taxpayers. Also known as a taxpayer identification number, one type of TIN is a ...