You might find it helpful to know you can also specify whole or partial zipcodes in the Advanced Tax Settings section of our Seller Admin > Cart Sales Tax/VAT Settings. For instance, if you entered these lines in that box:



857,6.6

85705,8.1



That would mean all zipcodes from 85700 thru 85799 would get charged 6.6% tax, except for 85705 which would get charged 8.1%.

We can only calculate Sales Tax based on Country, State/Province and whole/partial zipcode. You may wish to consult with your local Department of Revenue to determine your actual tax obligations for online sales.



If there's a basic tax rate that's common for most of CO, then under the Simple Sales Tax Settings section you would set that basic rate, enable Tax Buyers From State and select Colorado, then you can override that rate on a zipcode basis in the Advanced Sales Tax Settings.

Hm, I'm not certain that zipcodes even can cross county lines. You might ask your mail carrier or call the post office about that. We do require you to configure your Sales Tax calculator in Seller Admin manually; we don't have any way to make your Sales Tax calculator just work automagically without any configuration. If you wish, you might consider hiring an independent developer to plug your Sales Tax requirements into the Seller Admin for you; please see our Developer Directory here:

http://www.e-junkie.com/ej/developer-directory.htm