Hi jObe,
if you read back near the start of this thread you will see a bit of discussion between myself (split tax lines author), numinix (tax exempt author) and pdprenty (nice guy trying to use both mods). The short answer is that STL and CTE play nicely in zencart 1.3.7 but not yet in 1.3.8. What version of zencart are you using?
Alan




