When did the federal income tax become a permanent tax?

Name: When did the federal income tax become a permanent tax?
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The federal income tax became a permanent tax in 1913 when the Sixteenth Amendment to the U.S. Constitution was ratified, giving Congress the power to levy and collect taxes on income without needing to apportion them among the states based on population. Before this, income taxes had been levied only during times of war or other emergencies, and were temporary measures.

When Did the Federal Income Tax Become a Permanent Tax