Go to Tax Stats from the U.S. Internal Revenue Service.
For older information, search the Library Catalog for the following publications:
- STATISTICS OF INCOME. U.S. Internal Revenue Service.
- CORPORATION INCOME TAX RETURNS. 1954-
- INDIVIDUAL INCOME TAX RETURNS. 1954-
- PARTNERSHIP RETURNS. 1977- (RS)
- PRIVATE FOUNDATIONS. 1974/78- (RS)
- STATISTICS OF INCOME. SOI BULLETIN U.S. Internal Revenue Service. Quarterly. Summer 1981-
Aggregated rates by year are in a NBER (National Bureau of Economic Research) work, Federal Tax Policy and Charitable Giving by Charles Clotfelter, University of Chicago 1985.