How do you do this? Same situation, and they won't send me a ballot. Maybe has to do with the state?
Yes, it's about States' Rights in the Constitution. It varies enormously, with some states barring felons from ever voting to Maine, where Cons can vote absentee from their cells...
http://felonvoting.procon.org/view.resource.php?resourceID=286
Check it out. You may be able to vote after jumping through some hoops on the way to get there.