Since he received 1099-MISC, it would indicate that the per capita income is income from Indian gaming proceeds and therefore it is taxable. Unfortunately, you will not be able to claim him on your taxes.
In general, the per capita payments issued to a member of Indian tribes are not subject to federal income tax, unless they are from gaming proceeds.
Per Irs: " If you are a member of a federally recognized tribe and have received income from tribal per capita distributions or from Indian gaming proceeds, here is some important information.
Reported on a 1099-MISC income statement, this income should be included on Line 21 of Form 1040, with a description. The correct description will allow the return to process as quickly as possible! For paper or e-file returns, please enter one of the following descriptions on Line 21:
Indian Gaming Proceeds
Indian Tribal Distrib
Native American Distrib"
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