Number when requesting any of the following: The taxpayer's correct Social Security number, SSN, taxpayer identification number (TIN) or identification number (IIN) as required by section 6331, (1049) of the Internal Revenue Code. Taxpayers with Social Security numbers not in the correct range may receive a Form W-9 (canceled debt). (see below) The taxpayer's accurate taxpayer identification and tax payment information. (see below) The IRS may require an extension if the information cannot be obtained within 4 weeks. The Taxpayer Identification Number (TIN), or The taxpayer's correct name and address. Please note that Social Security numbers should not be listed on the form even if you receive a Form W-9. An extension may be issued for those numbers. Form 1099, Quarterly Report of Unclaimed Property (PDF) Please check or uncheck the boxes for your name and address.