Homeowners can still score an energy tax credit! For tax years 2009 and 2010, you can receive a tax credit of 30% of the cost of qualifying home improvements made over the two-year period. The maximum credit is $1,500 for both years combined. Qualifying improvements include such things as a new heating and air conditioning system, insulation, doors, and windows. Energy tax credits for big-ticket items, such as geothermal systems, are also available.