Federal tax credits for energy-efficiency home improvements are back. The law allows homeowners to claim tax credits of varying amounts on improvements such as insulation, energy-smart windows and highly efficient furnaces. Congress has made the credits retroactive, so improvements made in both 2012 and 2013 will qualify. The program has a cap of $500 in total credits. The limit goes back to 2006, when the very first credits became available. If you've already claimed $500 in credits fo...
