For tax filing purposes, you generally must provide a Social Security Number (SSN) or an Individual Taxpayer Identification Number (ITIN) for each dependent claimed on your return. The IRS requires this information to process your return and to verify the dependent’s eligibility for credits such as the Child Tax Credit or Earned Income Credit.
When an SSN is Required
- If your dependent is a U.S. citizen, U.S. national, or resident alien, you must provide their SSN.
- If your dependent is a nonresident alien, you may use an ITIN instead of an SSN.
- For dependents who are not eligible for an SSN (such as certain foreign nationals), you must apply for an ITIN using Form W-7.
Special Cases
- If your dependent is a qualifying child under age 17 and you are claiming the Child Tax Credit, the IRS requires their SSN or ITIN.
- If you are claiming a dependent who is not a U.S. citizen or resident alien, you must obtain an ITIN for them to claim them as a dependent.
- For dependents who are not eligible for an SSN (e.g., foreign nationals without immigration status), you must apply for an ITIN using Form W-7.
Failure to provide a valid SSN or ITIN for a dependent may result in the IRS disallowing the dependency exemption or credits associated with that dependent.
Source:
Publication 517: Social Security and Other Information
Publication 915: Social Security Benefits
Form W-7: Application for IRS Individual Taxpayer Identification Number
Disclaimer: Always verify requirements with the current year’s IRS Form 1040 instructions and state tax forms. For complex situations, consult a tax professional or CPA.