If you worked and earned money from a US source in 2012 you will need a Social Security Number (SSN) in order to file your tax return.
If you did not work and earn any money in 2012 from a US source you do not need a Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN).
Dependents who are being claimed as deductions on an income tax report, must have a SSN or an ITIN. A dependent in most cases can only be claimed on a Resident Alien tax report. However spouses from Canada, Mexico, Korea, Japan and Indian (students, not researchers from India) may be eligible to be claimed on a Non-Resident Alien return. In order to determine which kind of number your dependents need, use the following as a guide:
|Individuals who need an ITIN are:||Individuals who will not need a SSN or ITIN:|