washington final version comprehensive tax legislation negotiate house senate lawmakers preserve key renewable energy tax credit risk remove congressional business source say thursday congressional republicans reach deal tax legislation wednesday clear way final vote next week package would slash u.s. corporate tax rate 21 percent cut tax wealthy americans congressional business source brief status talk confirm production tax credit wind energy 7,500 electric vehicle tax credit house version bill target remain final bill lawmakers work produce tax package republican-controlled house senate pass different versions legislation president american council renewable energy gregory wetstone send note members wednesday say know certainty legislation also include alternative minimum tax amt corporations would reduce value production tax credit ptc wind project meanwhile renewable energy industry await final detail congressional negotiators address problems create provision include senate-passed bill call base erosion anti-abuse tax beat measure intend prevent multinational company abuse tax code would make tax credit like ptc wind less valuable provision would chill investment international company like vestas bank renewable energy sector industry experts say wetstone say negotiators work fix would allow ptc offset least 80 percent beat tax impose multinational company another source brief negotiations say much 90 percent credit could use offset beat tax still unclear precise term deal good news whole sector say liam donovan lobbyist bracewell focus tax infrastructure energy u.s. tax bill preserve key renewable energy credit source say