Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN)
Enter your SSN in the spaces provided. If filing a joint tax return, enter the SSNs in the same order as the names.
If you do not have an SSN because you are a nonresident or resident alien for federal tax purposes, and the Internal Revenue Service (IRS) issued you an ITIN, enter the ITIN in the space for the SSN. An ITIN is a tax processing number issued by the IRS to foreign nationals and others who have a federal tax filing requirement and do not qualify for an SSN. It is a nine-digit number that always starts with the number 9.