File Description / Source / Format / Notes / Date Created Articles and Data Release: The articles and data release are in PDF format. In most cases, this format is also combined with Excel ver. 4 (XLS) tables in compressed executable (EXE) files. June 2002. Federal Estate Tax Returns, 1998-2000 PDF (EXE) ZIP. Article. High-Income Tax Returns for 1999 PDF (EXE). Article. Personal Exemptions and Individual Income Tax Rates, 1913-2002 PDF. Data Release. Reconciling Corporation Book and Tax Net Income, Tax Years 1996-1998 PDF (EXE). Article. S Corporation Returns, 1999 PDF (EXE). Article. Unrelated Business Income Tax Returns, 1998 PDF (EXE). Article. Link: Historical Tables and Appendix