That was really generous of you. Unfortunately, it is not deductible for you, since he is not your dependent. Gifts given to indivuduals are not deductible. I kind of hate to say this but if you gave him over $14,000 you need to fill out a 709 gift tax form--although the gift will not be taxed.
Turbo Tax does not support the gift tax form 709, but here is a link:
https://www.irs.gov/pub/irs-pdf/f709.pdf
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