Yes, if your brother qualifies as a dependent, then you can claim him, but you must report his Obamacare Form 1095-A on your tax return, and are responsible for his Premium Tax Credit. See the FAQ below for more info about dependents: https://ttlc.intuit.com/replies/3288503
Also, see the FAQ below for more info on Form 1095-A. https://ttlc.intuit.com/replies/4248043
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