The Internal Revenue Service (IRS) is part of the U.S. Department of the Treasury. It is one of the most efficient tax administrators in the world. During fiscal year 2012, the IRS collected $2.5 trillion in revenue and processed 237 million tax returns. For every $100 it collected in fiscal year 2012, the IRS spent a mere 48 cents. The mission of the IRS is to provide U.S. taxpayers a top-quality service by helping them pay their taxes, enforcing the laws regarding taxes, and assisting taxpayers with understanding their taxes. The IRS values integrity and fairness toward all taxpayers. In the United States, Congress passes tax laws, and taxpayers are required to comply. The taxpayer’s role is to understand his or her tax obligations and ...