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When filing electronically, these supplemental forms should be submitted as attachments with your Revenue Online filing.
For questions, contact the Excise Tax Unit at DOR_excisetax@state.co.us, or call 303-205-6879.
If you already filed your return and submitted your payment, send in the supporting documentation via web message from your Revenue Online account, or mail them to the address on the nonfiler notification.
If you have questions, send us a web message from your Revenue Online account, call 303-205-6848, or 303-205-6879.
Colorado Department of Revenue
Excise Tax Accounting Section, Room 237
PO Box 17087
Denver, CO 80217-0087