More year-end tax tips.

In 2006, people who make energy-saving improvements to their home can claim tax credits from $50 to $4,000, as long as the work is on their primary residence and it's in the United States.

A taxpayer can claim a credit of 10 percent of the cost -- up to $500 -- of installing energy-efficient insulation or exterior windows that qualify under IRS rules. And taxpayers can claim credits from $50 to $300 -- again up to $500 total -- for other improvements, such as a $150 credit for installing an energy-efficient gas, propane or oil furnace, and another $150 credit for an energy-saving water boiler. No more than $200 of the $500 maximum can be for window improvements.

2006 Tax Tips from the Washington Post.