Colorado: Taxation: Income tax State senate enacts Colorado income tax bill. Post Mar. 1, 1949 State's first income tax measure signed by Governor Ammons. Pueblo Chieftain June 3, 1937 Witholding tax system changed. RMN April 22, 1961 p.5 State income tax will total $66 million end of fiscal year June 3(d; $14 million increase. Post May 24, 1961 P-1,3 Colorado income tax brings $70 million. R.M May 24, 1961 p.5 0
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