A premium subscription is required to access this article. Article Date: 08/01/2017 What Tax Rate Do You Want? The permanent federal income tax celebrated its 100thbirthday in the United States in 2013, a century after the ratification of the 16th Amendment to the U.S. Constitution. The federal income tax is the largest source of revenue for the U.S. government. It is also famous as one of the two unavoidables ... Log in to view full article. If you already have a subscription, please log in with your email address and password. User Name (Email Address): Password: Forgot your password? Click here to have your password emailed to you. To purchase a premium subscription, please use the links below. One-year premium subscription with unlimited access to all articles including reprint rights (see terms and conditions) for $2,000.00. Monthly subscription (3 month minimum) with unlimited access to all articles including reprint rights (see terms and conditions) for $195/mo. CLICK TO VIEW Terms and Conditions I ACCEPT You must accept the 'Terms and Conditions' before purchasing this product.