President Donald Trump has filed for an extension on his 2016 tax return, a White House official said Saturday. The official did not provide information on when Trump sought the extension or why. The official was not authorized to discuss the president’s taxes and insisted on anonymity.Tax Day this year was on April 18. The Internal Revenue Service allows individuals and businesses to apply for a six-month extension to get more time to file a return. An extension does not provide more time to pay taxes. …