The Colorado Department of Revenue makes it easy
Shoppers who take advantage of “Cyber Monday” Internet sales on Dec. 2 should check their receipts for sales tax charges and save those receipts where tax was not paid, so they can pay consumer use tax.
What is Consumer Use Tax?
When sales tax isn’t collected by the seller on a taxable item purchased from the Internet or mail order catalog, such as clothing, electronics, appliances or other tangible property, it is the purchaser’s responsibility to report and pay use tax. Colorado state use tax is 2.9 percent. Consumers should be aware that some local special districts in Colorado have use tax.
How do individuals pay the tax?
The Colorado Department of Revenue makes it easy to pay consumer use tax through its free Revenue Online service. Under “For Individuals,” click on “File a Return” to complete the Consumer Use Tax Return. The online system has built-in tax rates for the location of the residence mailing address. The easy-to-use system calculates the amount of tax owed based on the purchase total and will help avoid errors.
Use tax for individuals on purchases made during 2013 is due on April 15, 2014.
See publication FYI General 10, Consumer Use Tax.