Note: Tax rates include normal taxes of 1.5 percent on the first $4,000 of taxable income, 3 percent on the next $4,000, and 5 percent on taxable income over $8,000, plus applicable surtaxes. Tax liability reduced by 1 percent by Joint Resolution of Congress, No. 133, approved by President Hoover on December 16, 1929. Last law to change rates was the Revenue Act of 1928."