The Internal Revenue Service (IRS) conducts investigations to ensure that taxpayers are in compliance with the tax laws. An IRS AUDIT is an examination of a taxpayer's financial records to verify that they have reported their income and deductions accurately. During an AUDIT, the IRS may request additional information or documents from the taxpayer to support their claims. The results of an AUDIT can range from no changes to the taxpayer's return to a full-scale investigation by the IRS.