Colorado Income Tax
General administration:
Department of Revenue
State Capitol Annex
1375 Sherman Street
Denver, CO 80261
303-238-7378
http://www.revenue.state.co.us/
Request identification number by filing Form CR 100 (Business Registration):
Department of Revenue
1375 Sherman Street
Denver, CO 80261-0009
303-238-7378
Register for electronic funds transfer (required if prior fiscal year withholding liability in excess of $50,000) by filing Form DR 5785 (Authorization for Electronic Funds Transfer for Tax Payments):
Department of Revenue
Registration Control Section
1375 Sherman Street
Denver, CO 80261
303-866-3272
Deposit and report weekly, monthly, quarterly (by last day of month following end of quarter), or seasonal withholdings by filing Form DR 1094 (Income Withholding Tax Return);
Furnish annual summary statements of wages paid and taxes withheld to employees on Form W-2 (Wage and Tax Statement) by January 31 and to state on Form DR 1093 (Annual Reconciliation of Income Tax Withheld) by March 15:
Department of Revenue
1375 Sherman Street
Denver, CO 80261
800-322-2086
Deactivate identification number by filing Form DR 1102 (Account Change or Closure Form):
Department of Revenue
Registration Control Section
1375 Sherman Street
Denver, CO 80261
303-866-3272
