“Donald Trump used a dubious accounting maneuver to claim improper tax breaks from his troubled Chicago tower,” according to an IRS inquiry uncovered by ProPublica and the New York Times. “Losing a yearslong audit battle over the claim could mean a tax bill of more than $100 million.” “The 92-story, glass-sheathed skyscraper along the Chicago River is the tallest and, at least for now, the last major construction project by Trump.