US tax office head quits over scandal WASHINGTON: The acting head of the US Internal Revenue Service has quit after the tax office became embroiled in a controversy over the targeting of conservative groups for extra scrutiny. Steven Miller, who resigned on Wednesday, said in a message to colleagues there was a "strong and immediate need" to restore public trust in the nation's tax agency. "It is with regret that I will be departing from the IRS as my acting assignment ends in early June," Mr Miller said in an internal message that was released by the IRS. This has been an incredibly difficult time for the IRS given the events of the past few days, and there is a strong and immediate need to restore public trust in the nation's tax agency.