The taxing and spending clause grants Congress the authority to acquire revenues to finance federal government programs, make payments to individuals, and provide grants-in-aid to states. The power to tax became controversial after the Civil War (1861-1865) when Congress imposed taxes on incomes, but the constitutionality of these taxes turned on the distinction between direct and indirect taxes. In (1881), the Court upheld a wartime income tax as an indirect excise tax, but in (1895), it found that a tax on income from property was an invalid direct tax because it was not apportioned. The Court reversed itself again in (1911), holding that a corporate income tax was an indirect excise tax on the privilege of doing business. The Sixteenth Amendment, adopted in 1913, eliminated the confusion by granting Congress the power to impose taxes on incomes from any source without having to comply with the apportionment requirement.