If you made improvements that made your primary home much more energy efficient, you may be eligible for a 30% credit up to a total of $1,500.  Some of the qualifying improvements are:  new insulation, replacing exterior doors and windows, putting in a sky light, metal or qualifying asphalt roof, heat pumps, air conditioner, water [...]

If you were issued a Mortgage Credit Certificate on a new 2009 mortgage on your primary residence, you may be eligible for an additional tax credit.

If you are deducting the mortgage points you paid in a previous year, over the life of your loan, you can deduct the remaining balance of those points this year if you sell or refinance your home.  If you refinance with the same mortgage company, however, you must deduct the remaining balance over the [...]

First time home buyers can receive up to an $8,000 tax credit for homes bought after 2008.  You can also claim the credit for a home you purchase before May 1, 2010 on your 2009 return. 
Long-term home owners may be eligible for a credit of up to $6,500, if you purchase a new residence between [...]

There are now two energy credits available for your home.  Each can be worth up to $1,500.  The ‘Nonbusiness Energy Credit’ applies to energy improvements you make to your home for certain high-efficiency heating and air systems, water heaters and stoves.  The credit is for 30% of the cost and will apply to purchases made [...]