Looks like they are taking their marching orders from the top still. http://coloradostatesman.com/content...line-sales-tax

The House Finance Committee last week approved two bills to begin that process: House Bill 13-1295, which puts Colorado into position to participate in the federal Marketplace Fairness Act; and HB 1288, a bill designed to streamline the sales tax process.The third bill: HB 1312, which was to begin immediate collection of online sales taxes, was killed by that same committee when its sponsors couldn’t promise that Colorado wouldn’t wind up in court again.
The Democrat-controlled General Assembly in 2010 passed HB 10-1193, to require online retailers to report to the state how much Colorado citizens owed in sales taxes for those online purchases. However, that law was challenged in court by the Direct Marketing Association. A Denver District Court judge issued a permanent injunction against the bill, and the case is now awaiting appeal with the 10th Circuit Court of Appeals.