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The SOI Bulletin is issued quarterly and "provides the earliest published annual financial statistics obtained from the various types of tax and information returns filed."
Search within Tax Notes a publication by Tax Analysts. Click on Sources in the left-hand menu and select Find Sources. Search for Tax Notes in the search box. Select the publication from the listing of results. When the publication is selected click on OK-Continue to search within the publication.
Historical Corporate and Personal Income Tax Rates by Country
Tax Foundation provides information on tax policies and tax rates. Data can be downloaded in PDF or as an Excel spreadsheet. Some of the most useful data includes: