Trump Hobbled the I.R.S. This C.E.O. Now Has to Make It Work.

Frank Bisignano is the first chief executive of the I.R.S., where there’s hope he will end a chaotic stretch at the agency. The tax filing season, which started Monday, is his first test.This year’s tax filing season could be an even more formidable challenge than usual for the Internal Revenue Service and Frank Bisignano, its chief executive.