Frequent Asked Questions > Individual Taxpayer Identification Number Questions > How do I know if I need an ITIN?
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If you do not have an SSN and are not eligible to obtain an SSN, but you have a requirement to furnish a federal tax identification number or file a federal income tax return, you must apply for an ITIN. By law, an alien individual cannot have both an ITIN and an SSN.
IRS processes returns showing SSNs or ITINs in the blanks where tax forms request SSNs. IRS no longer accepts, and will not process, forms showing “SSA205c,” “applied for,” “NRA,” blanks, etc.
Last updated on August 26, 2010 by Valderrama Partners