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Internal Revenue Service


The Internal Revenue Service, a bureau of the U.S. Department of the Treasury, administers and enforces the federal tax laws and regulations. Its website is organized by user categories (e.g., Individual, Business, Charities & Non-Profits, Government Entities, and Tax Professionals) and can be easily navigated with the Site Map...

United States Tax Court


The U.S. Tax Court hears disputes regarding tax deficiencies which have been claimed by the Internal Revenue Service, but have not yet been paid by the taxpayer. Its site includes a database of Opinions (1995-present) and Docket& ...