State Sales Tax not consistently calculated

[scottross1957]

Joomla 2.5.16, VM 2.0.22c
I have a state sales tax configured - Tax per bill, +% of 2.9, Currency = US Dollar, Country = US, States = Colorado - all other items are "Available for all"

For orders with Colorado addresses, some orders display the "Colorado Sales Tax" label but have $0 in tax, other orders show the correct amount. I have no unshippable products, have no special tax-free products. I am not able to determine a reason for this inconsistent behavior.

Any suggestions?

[freetran]

Hi, same issue here.  A bit older VM (2.0.20b) and same Joomla (2.5.16)

Did you probably notice any coincidence with the 2.5.16 update?

[jenkinhill]

VM2.0.24a has some fixes in place for issues introduced by J2.5.16 so maybe try an upfdate (on a backup site, of course).