Upgrade from Sage 100 Std to Sage 100 2016 Std. SU2 with AvaTax. Have the latest AvaTax connector installed, all the setup appears complete and the address validations work when we click the small @ icon. We did copy the MAS90\AvaTax folder to the C:\ and double clicked the register_for_com.bat per the instructions I have. We see ""TAX ERROR"" on the forms (stock form also) and the SO Sales Journal says the invoices has message that states a tax recalc. needs done and some say there is ""Tax structure errors"". AvaTax is the only mod, any ideas on how to resolve this, they cant process or update any invoices.