The American Institute of Certified Public Accountants is the national, professional organization for all Certified Public Accountants. Its mission is to provide members with the resources, information, and leadership that enable them to provide valuable services in the highest professional manner to benefit the public as well as employers and clients. The Internal Revenue Service (IRS) is committed to making every one of the hundreds of thousands of pages, documents, and files on IRS.gov, its World Wide Web site, accessible to the widest possible audience. The navigation and layout have been improved using recommended guidelines outlined in Section 508 of the Rehabilitation Act Amendments of 1998. As new content is added, we will continually be working to refresh and improve the site to increase its accessibility.