1. Walt Anderson was found by the U.S. Tax Court to owe $247.5 million in tax deficiencies and penalties for the years 1998 and 1999. 2. With interest, Anderson's total tax liability was estimated to be over $496 million owed to the IRS as of March 2011. 3. Anderson was also found to owe an additional $23 million to Washington D.C. in back taxes, bringing his total tax debt to over $519 million.