Here is some general information.
Tax credits are available for taxpayers who purchase a qualified principal residence on or after May 1, 2010, and before January 1, 2011. Additionally, the New Home Credit is available for taxpayers who purchase a qualified principal residence on or after December 31, 2010, and before August 1, 2011, pursuant to an enforceable contract executed on or before December 31, 2010. The purchase date is defined as the date escrow closes.
The tax credits are limited to the lesser of 5 percent of the purchase price or $10,000 for a qualified principal residence. Taxpayers must apply the total tax credit in equal amounts over 3 successive tax years (maximum of $3,333 per year) beginning with the tax year in which the home is purchased. The tax credits cannot reduce regular tax below tentative minimum tax (TMT). The tax credits are nonrefundable and unused credits cannot be carried over.
For more information about the tax credits click here