The U.S. House of Representatives voted today to extend the closing deadline by three months to homebuyers who are trying to get the popular tax credit by the end of the month.  If the Senate passes the extension, it will give homebuyers who met the April 30 deadline of having a signed purchase agreement until September 30 to complete their purchases.  Homebuyers who have signed purchase agreements by April 30 currently have until Wednesday to close on the purchase to qualify for the tax credit.  The Senate still has to approve the measure before President Barack Obama can sign it into law.