(Denver Post) Colorado’s efforts to compel large online retailers to collect millions of dollars in state taxes on Internet sales scored a win Tuesday, although enforcement of the so-called Amazon tax law may be contingent on whether opponents continue their legal challenge.

In the latest development, a federal appeals court ruled that a lower court overstepped its jurisdiction in tossing out the law last year.

The law, passed in 2010, imposes extensive reporting requirements on e-tailers that don’t collect Colorado’s 2.9 percent use tax on purchases.

The law was intended to urge non-collecting retailers to start charging the tax.

Note: Read our discussion guidelines before commenting.