In this 2006 article, tax attorney Robert E. McKenzie discusses tax scams.
IRS Criminal Investigation (CI) is comprised of approximately 4,400 employees worldwide, approximately 2,600 of which are special agents whose investigative jurisdiction includes tax, money laundering and Bank Secrecy Act laws. While other federal agencies also have investigative jurisdiction for money laundering and some bank secrecy act violations, IRS is the only federal agency that can investigate potential criminal violations of the Internal Revenue Code.
On January 6, 2012 he Internal Revenue Service released a new set of tax gap estimates for tax year 2006. The tax gap is defined as the amount of tax liability faced by taxpayers that is not paid on time.