Federation of Tax Administrators site is especially useful for state-to-state comparisons of tax rates, tax collections, and more
Here you will find a wide range of tables, articles, and data that describe and measure elements of the U.S. tax system.
Provides information on the history of U.S. public finance. Plus, you can see the tax returns of several presidents and some recent presidential candidates.
Joint venture of Urban Institute and Brookings Institution composed of nationally recognized experts in tax, budget, and social policy. Provides timely analysis and facts to lawmakers, journalists, citizens, and researchers.
U.S. Department of Treasury, a cabinet department, has a Tax Policy Center and offers e-mail alerts, social media and RSS feeds.
Clear, non-partisan economic and social policy research - includes major anaylses of current fiscal and tax policy