The Colorado Department of Revenue has conslidated and expanded its online services into a new interface called Revenue Online. This new interface will allow you to view your tax account history and file returns for the following taxes:
It also allows users to make tax payments online, including estimated, extension, and tax return payments for the tax types listed above.
Other features include:
Other business services, such as Sales Tax License Verification and Viewing Local Sales Tax Rates, have also been moved to Revenue Online and are available in the Business section under BusinessServices.