Obama released his tax returns when he ran for president, just like every other candidate in recent history has, as a courtesy to a public who cares about fiscal responsibility. Well, except for one guy. Turns out Republicans are less concerned about fiscal responsibility than they've let on over the years.
Unless you're talking about his birth certificate? Cuz that was released too.
Or are you looking for more? Honestly, at some point you have to let go of the idea of Obama being a criminal. If he was, you would already have the proof, with all the investigations he dealt with as president.
<insert mundane and childish insult>
Grow up.