For US accounts without the Advanced Taxes feature: If this customer is taxable, check the Taxable box. When creating a Canadian customer under a U.S. subsidiary the customer form shows the Taxable box. After you save the customer record, the Taxable box changes to PST Exempt box, if the U.S. subsidiary has a Canadian nexus. This is because the customer is assigned to a nexus based on the customer's address. If the Taxable box is checked, then after saving the customer record, the field is changed to PST Exempt box but it is not checked. Similarly, if the Taxable box is not checked, then after saving the customer record, the PST Exempt box is checked.