President Barack Obama and his wife, Michelle, reported $1.7 million in adjusted gross income last year and paid $453,770 in federal income taxes.

The Obamas reported $1.3 million in taxable income after deductions, according to a 2010 tax return released by the White House today, the deadline for filing tax returns. Obama earned his $400,000 presidential salary plus almost $1.4 million in income associated with his books.

The Obamas’ adjusted gross income dropped about 69 percent from last year, when it was $5.5 million. Their total federal income tax liability dropped about 75 percent from last year, when it was $1.8 million.

In 2010, Obamas donated $245,075 to charities, or 14.2 percent of their adjusted gross income. That’s less than the $329,100 they gave in 2009, when charitable contributions made up 6 percent of their adjusted gross income. In 2009, the Obamas also donated the entire $1.4 million that the president received for winning the Nobel Peace Prize, which wasn’t counted as taxable income because it was transferred directly to charities.

The largest single donation of $131,075 in 2010 went to Fisher House Foundation Inc., which provides lodging for military families visiting people who are hospitalized. The next-largest contribution, $15,000, went to the Clinton-Bush Haiti Fund.

In addition to the charitable contributions, the Obamas claimed itemized deductions of $78,269 for state and local taxes and $49,945 for home mortgage interest. They owed the state of Illinois $51,568.

The Obamas made estimated tax payments during the year and will receive a federal tax refund of $12,334 and a state tax refund of $959.

Vice President Joe Biden and his wife, Jill, reported adjusted gross income of $379,178 and paid $86,626 of federal income taxes. They owed $7,180 of that amount with the return.

The Bidens contributed $5,350 to charity. Their largest cash contribution of $1,400 went to the Northern Virginia Community College Alumni Fund. Jill Biden teaches at the school.