Lesson 4 discusses the guidance provided by the IRS on the steps taken during a U.S. Information Reporting and Withholding audit. The lesson includes a description of each step throughout the audit process and how the information discussed in the prior lessons are used by the IRS for purposes of the audit, including a review of account opening procedures, identification of payees U.S. or foreign status and analyzing the withholding agent’s tax withholding system.