No Child Tax Credit for Illegals Act of 2025

This bill amends the Internal Revenue Code to require a valid Social Security Number (SSN) for all qualifying children claimed on the Child Tax Credit. Specifically, it mandates that taxpayers must include the SSN of both the taxpayer (or both spouses on a joint return) and each qualifying child on their tax return to claim the credit. The requirement applies to all taxpayers except members of the Armed Forces (who may use a spouse's SSN), and excludes individuals without an SSN issued to a U.S. citizen or under specific Social Security Act provisions. The change takes effect for taxable years beginning after the bill's enactment date.