(23 in Sept/earned income over $4300)
Because he was a full time student for at least one semester that started in the tax year, his earnings are irrelevant. What matters here, is if he provided "more" than 50% of "his own" support. If he did, then you do not qualify to claim him. My guess would be that he did provide more than half his own support for the entire 2021 tax year. So you wouldn't qualify to claim him.
