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The Colorado Department of Revenue recognizes that most taxpayers want to comply with state tax laws. The Taxation Division provides many ways to learn about Colorado taxes including online or in-person sales tax classes, instructional and informational videos, FYI publications, tax regulations, letter rulings and much more. We've organized our most commonly used education and research resources on this web page.
Colorado Department of Revenue Forms
Colorado Department of Revenue Reference Publications
Revenue Bulletin 18-01: ALL PRIOR REVENUE BULLETINS RESCINDED