Georgia State University
Georgia State University: Semantic Constitution
A review of the U.S. Constitution is presented by topics and concepts. A full list of topics gives an alphabetical listing, that when clicked, provides the actual text.
US Government Publishing Office
U.s. Government Publishing Office: Constitution of the United States of America: 16th Amendment Income Tax [Pdf]
Read this text of the 16th Amendment, followed by the history of the Amendment and an analysis. (PDF)
Cornell University
Cornell University: Law School: Income Tax Law: An Overview
A collection of resources for understanding income tax law, including its roots in the Constitution, federal and state statutes and regulations, judicial decisions, and links to the websites of government and tax agencies.
Cornell University
Cornell University: Law School: Constitution of the u.s.
The Constitution of the United States is provided by the Legal Information Institute of Cornell University of Law.
Annenberg Foundation
Annenberg Classroom: Sixteenth Amendment
Text of the 16th Amendment accompanied by an explanation. Site includes links to related resources.
Annenberg Foundation
Annenberg Classroom: Federal Taxation
Check out this interactive timeline documenting the history of federal taxation in the United States.
Library of Congress
Loc: America's Story: Tax Day (April 15, 1913)
How did this day come to be the national day for taxes being due? What is it for? To find out the answers to these and other questions, visit this site from the Library of Congress.
Thomson Reuters
Find Law: Annotation 2: Sixteenth Amendment
This resource describes the different types of income that are taxable by the government based on numerous court cases in which definitions of the 16th amendment Corporation Tax Act of 1909 were applied.
Thomson Reuters
Find Law: u.s. Constitution: Annotation 1: Sixteenth Amendment
This article provides the background of the 16th Amendment, which established a federal income tax.
Thomson Reuters
Find Law: u.s. Constitution: Sixteenth Amendment
This resource provides a detailed overview of the 16th amendment to the U.S. Constitution. Content includes a focus on income tax, the history and purpose of the amendment, and the incomes subject to taxation.
Bankrate
Bankrate: Are Taxes Voluntary?
Provides a commentary on whether paying taxes is voluntary or required. Good information, especially for younger taxpayers. (2001)