The US Constitution (16th amendment).
16th Amendment
the 16th amendment gave congress the power to levy an income tax.
The 16th amendment gave congress the power to levy income taxes, and impose a direct tax.
16th Amendment
16th amendment
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16th amendment
16th Amendment
Abraham Lincoln imposed the first federal income tax in 1891, though it was of questionable legality until the 16th Amendment to the Constitution was ratified February 3, 1913.
16th amendment
the 16th amendment allows congress to authorize an income tax.