Those indicted include BDO Seidman executive Denis Field and tax attorney Paul M. Daugerdas, according to The New York Times.
The indictment said one shelter, known as SOS, was sold to 550 wealthy clients and generated $3.9 billion in bogus tax losses in two years, the Times reported.
The Times said the indictments are the largest crackdown on tax shelter promoters since mid-2005. At that time, the accounting firm KPMG admitted to wrongdoing over its work with questionable shelters and paid $456 million to the government to settle the case.