April 15 is the last day you can send in federal income tax forms. The Constitution gives the federal government the power to collect taxes. Today, the United States uses taxes to pay for things the government does. Taxes pay for things like national defense, educational programs and Social Security. April 15th is the last day we can send our federal income tax forms. We send them to the Internal Revenue Service, or IRS. The IRS is the federal government office that collects taxes.
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