I’d like my Shopify store to handle domestic taxes automatically and then surface that information clearly to customers and to our team. Our store uses one single tax rate for every state, so there’s no need for province-by-province rules—just a reliable, automated calculation that always applies the correct percentage. Here’s what I need the finished setup to do: • Pull the domestic rate into Shopify’s back-end so it applies to every order without manual intervention. • Inject that percentage into the order-confirmation email template so buyers immediately see the tax line item. • Include the same percentage field in any order export (CSV or XLSX) we run from the admin. • If it can be done cleanly, generate and email a branded PDF tax summary to the customer right after purchase. I don’t mind whether you rely on native Shopify settings, a Liquid-based template tweak, an app, or the Admin and Email APIs—whichever solution is quickest to maintain and won’t break in future updates. Once complete, I should be able to place a test order and see the percentage displayed everywhere it needs to appear, download an export that lists the same figure, and receive the auto-generated PDF without extra clicks. Let me know roughly how long you’ll need, the approach you favour, and any apps or code snippets you plan to use so I can keep them documented for future staff.