In the current version, tax on the online-ordering cart is driven by your delivery address (or, for Pickup, the pickup point's own location): the system looks up a tax rate for your zip code, falling back to your state's rate, and — if the store has connected an external tax provider for that state — that provider's resolved jurisdiction rate can override the built-in rate. That rate is only actually charged, however, if the store has turned on "Charge taxes on delivery?"; with it off (the default), no tax line is added. In the code paths reviewed, this tax is calculated against the delivery/shipping fee, not as a separate line on the meal/item subtotal — so an order with a $0 delivery fee (Pickup with no charge, or a waived/free-delivery order) can show no tax at all even in a taxable state. If your store handles food sales tax differently (e.g. built into item pricing or invoiced separately), that would happen outside this flow.