We've just launched our app Printmas which allows Shopify users to integrate print-on-demand ugly Christmas sweaters into their stores.  The app lets upload your store's artwork/designs so you can offer them on ugly Christmas sweaters during the holi...

I have 3 orders where sales tax should have been collected but it did not, shows as followingTax amount was updated from $63.15 USD to $0.00 USD. Same user order multiple times and some orders charged Tax and some orders are not? Why would this occur...