Update email notifications
The default templates for email notifications are optimized for merchants using the latest version of Shopify's tax service for US orders. If you use default templates, then your email notification templates maintain the best buying experience for your customers.
If you have customized your notification templates, then you might need to change your notification templates manually. Not all customized templates can be updated automatically. In addition to the changes necessary to display estimated tax, some additional changes might be required to your templates. These changes allow your templates to accurately describe and display the difference between an authorized payment, which is a payment that has been verified as available on a customer's credit card, and a captured payment, which is a payment that has been finalized and charged to the customer's card.
The following links provide specific instructions for updating each type of notification template. You can also use this checklist to track which templates need to be updated: