It appears that my store has a serious problem when it comes down to calculating state base sales taxes. A fresh Prestashop install 1.2.4 works fine and displays US style taxes fine. My shop, running 1.2.4 refuses to calculate taxes. If i import my database from my store to the fresh install, the taxes stop functioning too. Something is wrong in my database, that if I import it in a sane install, taxes stops functioning. Sadly, my store was running fine but suddenly stopped functioning. How can I troubleshoot the problem? What are my options. This is very frustrating - my shop is live, I have customers coming in and purchasing, but I cannot sell to the store's home state. Please help.