“Hiding income offshore, identity theft and return preparer fraud topped the IRS’s list of tax scams in 2011. The Internal Revenue Service issues an annual list of the top 12 tax scams, known as the “Dirty Dozen.” These scams are illegal and can lead to significant penalties and interest and possible criminal prosecution.” See http://www.irs.gov/newsroom/article/0,,id=173404,00.html for more information and details on these scams.