I created a new Tax Group for HST. I made this Tax Group our Default tax group and verified that all customers had a blank tax group to ensure the default was the active Tax Code. I also created separate Invoice specs for the HST Invoice. I have had two Invoices for two separate customers come up with a different tax group (we have more than one). I am not sure why this would happen. As both customers have had Invoices before and after this new Tax Group and all was well. Not sure Why the tax group change in between Invoices?
Thanks, Jackie