Every year around this time, the Internal Revenue Service publishes a list of the year’s “Dirty Dozen Tax Scams”. Here they are as an infographic courtesy of The Accounting School Guide.
Source: AccountingSchoolGuide.com
You can find more detailed information from the testimony of the IRS’ Timothy P. Camus before the Committee on Finance U.S. Senate on Tax Schemes and Scams During the 2015 Filing Season.