Tax & shipping
Where: Pricing → Tax & shipping
Pricing → Tax & shipping has two sections.

Pricing → Tax & shipping — VAT rates and table-rate shipping
VAT rates. Add rows inline: country (2-letter code), tax class, rate, and name, then press Add (click an existing row to edit it and the button becomes Save). The key detail, quoted from the page: “Rate is a fraction (0.16 = 16%). Use a class of exempt with rate 0 for exemptions.”
Shipping rates. Table-rate shipping: country, service name, carrier, amount, and an optional “free over” threshold. These rates are what appear as delivery options in the quote editor and at storefront checkout. Validation: “2-letter country + service required”.
If the quote editor says “No rates for the customer’s destination”, it means no shipping rate row matches the buyer’s country — add one here.