Colorado Department of Revenue
tax.colorado.gov › contact-us-by-phone
Contact Us By Phone | Department of Revenue - Taxation
Please add our Taxpayer Services number (303) 238-7378 as a recognized contact in your phone or other electronic device to prevent spam filtering of your scheduled call. To schedule a call with the Taxpayer Helpline Call scheduler, use the button below to schedule a time for Taxpayer Services ...
Colorado Department of Revenue
tax.colorado.gov › contact-us
Contact Us | Department of Revenue - Taxation
All State Offices will be closed December 24 to 26 · Taxpayer Service Representatives are available Monday through Friday, 8:00 a.m. to 4:30 p.m. MT (except on state holidays). Language translation service is available over the phone. Request this service once connected to a Taxpayer Service ...
Factsheet
Department overview
Formed 1941
Type Revenue service
Department overview
Formed 1941
Type Revenue service
Colorado Department of Revenue
cdor.colorado.gov
Home | Colorado Department of Revenue
Colorado Department of Revenue is the state agency for DMV, Gaming, Liquor Enforcement, Lottery, Marijuana, Natural Medicine, and Taxation Divisions.
Colorado Secretary of State
sos.state.co.us › pubs › business › FAQs › startBusiness.html
Starting a business in Colorado
For information regarding state taxes and state sales tax licensing, contact the Colorado Department of Revenue, www.colorado.gov/revenue. For information regarding federal taxes and obtaining an employer identification number (EIN), contact the Internal Revenue Service, www.irs.gov.
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Colorado Department of Revenue
tax.colorado.gov › contact-the-collections-section
Contact the Collections Section | Department of Revenue - Taxation
Phone: (303) 205-8291Hours of Operation:Monday-Thursday: 8:00 a.m. to 4:30 p.m.Friday: 9:00 a.m. to 4:30 p.m.Mailing Address:Colorado Department of RevenueAttn: CollectionsP.O. Box 17087Denver, CO 80217-0087
Sales Tax Calculator
salestaxhandbook.com › colorado › sales-tax-department
Contact the Colorado Department of Revenue
Please contact the Colorado Department of Revenue with any questions or concerns about your sales tax account, sales tax compliance queries, etc.
Colorado Department of Revenue
tax.colorado.gov › contact-us-by-mail
Contact Us By Mail | Department of Revenue - Taxation
Section or Employee Name and Room Number P.O. Box 17087 Denver, CO 80217-0087 · Colorado Department of Revenue Section or Employee Name and Room Number 1351 5th St.
Internal Revenue Service
irs.gov › businesses › small-businesses-self-employed › colorado
Colorado | Internal Revenue Service
Taxpayer identification numbers (TIN) Colorado state website Small business events in your area · MyBizColorado Department of Regulatory Agencies - Business License Office of the Secretary of State Colorado Office of Economic Development and International Trade · Colorado Department of Revenue ·
Colorado Department of Revenue
tax.colorado.gov › help
Help | Department of Revenue - Taxation
To use this service, dial the appropriate number above. Give the Relay Colorado agent the number that you would like to call.
Colorado Secretary of State
sos.state.co.us
Colorado Secretary of State
Colorado Secretary of State Jena Griswold · End of year site maintenance - From Wednesday, December 31st at 11:30 PM until Thursday, January 1st at 12:00 PM, our filing services will be unavailable during scheduled system upgrades
Mesacountylibraries
guides.mesacountylibraries.org › taxes › state
State Tax Information - Taxes - LibGuides at Mesa County Libraries
October 30, 2025 - ... A service to check the status of your current income tax refund and other information about your Colorado income tax account. ... GRAND JUNCTION SERVICE CENTER 222 South 6th St., Room 208 Grand Junction, CO 81501 Phone: 970-248-7140 Hours: Monday- Friday open 8 a.m.
Square
squareup.com › help › us › en › article › 6322-colorado-employer-tax-information
Colorado employer tax information | Square Support Center - US
If you are already registered with the Department of Revenue, you can find your Colorado Account Number and Filing Frequency on the Colorado Department of Revenue website or by contacting the CO Department of Revenue at 303-205-8333.