IRS collects milestone $1 billion in back taxes from high-wealth taxpayers ABC NewsI.R.S. Crackdown on Delinquent Millionaires Yields $1 Billion The New York TimesIRS collected $1 billion in back taxes from millionaires in less than a year CNNIRS says it has clawed back $1 billion from millionaire tax cheats CBS NewsTreasury, IRS announce ‘major milestone’ of $1 billion in past-due taxes collected from millionaires CNBC