AARP Tax Aide Program
American Bar Association - Section of Taxation
American Institute of Certified Public Accountants
American Law Institute
American Taxation Association
Association for Computers and Taxation
California CPA Education Foundation
California Society of Enrolled Agents
California Taxpayers' Association
Canadian Tax Foundation
Canadian Taxpayers Federation
Center for Multistate Taxation
Chartered Institute of Taxation
European-American Tax Institute
Federation of Tax Administrators
Florida TaxWatch Research Institute
Institute for Professionals in Taxation
Institute of Property Taxation
International Association of Assessing Officers
Malaysian Institute of Taxation
Minnesota Taxpayers Association
Multistate Tax Commission
National Association of Computerized Tax Processors
National Association of Enrolled Agents
National Association of Tax Practitioners
National Tax Association
North American Tax Policy Academy
Taxation Institute of Australia
Tax Foundation