Since he/she is over 23, the dependent support rule changes from "didn't provided more than half of your own support" to "your parents must not have provide more than half your support. That is age, alone disqualifies her from being a qualifying child, so the qualifying relative rules apply. Full rules: <a rel="nofollow" target="_blank" href="
https://turbotax.intuit.com/tax-tools/tax-tips/Family/Rules-for-Claiming-a-Dependent-on-Your-Tax-Ret...>
But that should be academic. His birth date, alone, will prompt TurboTax (TT) to ask the correct version of the support question.
