A conversation with a local RV-10 builder brought up the issue of taxes as they apply to homebuilt aircraft. He was considering registering his aircraft in the state he would eventually move to, as he had learned that Michigan aircraft taxes are exorbitant. That got me thinking about educating myself on the tax burden I would eventually be facing. AOPA has some information, but I was wondering if anyone here has some suggestions for sources of tax information dealing specifically with homebuilt aircraft.