The IRS statistics website will contain a wide range of statistical information on taxes.
Bureau of Economic Analysis. The U. S. Department of Commerce Bureau of Economic Analysis provides economic data and reports.
Statistical Abstract of the United States. The Statistical Abstract of the United States is a source of compiled government statistics going back to 1878, issued yearly. The 2012 edition as well as earlier versions are available in print and on the web. The Census Bureau is terminating collection of this data as of October 1, 2011. ProQuest and Bernan Press will now be producing the Statistical Abstract and will soon make the 2013 edition available.