A federal grand jury in Charlotte, North Carolina returned an indictment today charging two tax attorneys and an insurance agent with conspiring to defraud the United States and encouraging consumers file bogus tax returns based on their advertising and operation of a fraudulent tax shelter. According to the indictment, from 2011 to the existing Michael Elliott Kohn and Catherine Elizabeth Chollet, equally lawyers and citizens of St. Louis, Missouri, and David Shane Simmons, a certified coverage agent and broker dependent out of Jefferson, North Carolina, conspired to defraud the United States by marketing, advertising and marketing, and advertising to customers a fraudulent tax scheme known as the Obtain Elimination Strategy…