https://www.taxview.state.co.us/QueryTaxrates.aspx?selected=1
Partial access without CO bar membership - http://www.state.co.us/courts/sctlib/
http://www.revenue.state.co.us/TPS_Dir/wrap.asp?incl=Whatsnew
http://www.revenue.state.co.us/TPS_Dir/wrap.asp?incl=salestaxforms
email – Questions@spike.dor.state.co.us
Tel. – (303) 232-2416