Request for Taxpayer Identification Number (TIN) and Certification? Form W-9, Request for Taxpayer Identification Number (TIN) and Certification, is an Internal Revenue Service (IRS) tax form that ...

A Tax Identification Number (TIN) is required for all entities to ... that they may be eligible to receive. An ITIN application, Form W-7, can be mailed to the IRS or presented in person at ...

For most individual taxpayers, their SSN is their TIN. SSNs are issued ... complete IRS form W-7, "Application for IRS Individual Taxpayer Identification Number." Submit it to the IRS with the ...