There are many great sites on the Internet, but trying to actually find those great sites can be a frustrating experience. We have compiled a list of Websites that we have found to be helpful resources of information. When you click on a link, a new window will pop up. Close the window when you are ready to return to this page. Professional Contacts American Institute of Certified Public Accountants Maryland Association of Certified Public Accountants Virginia Society of Certified Public Accountants National Association of Certified Valuation Analysts Tax The Internal Revenue Service Maryland Comptroller of the Treasury Maryland State Department of Assessments and Taxation District of Columbia Commonwealth of Virginia