As of August 31, 2026, Shopify's orderUpdate GraphQL mutation now automatically recalculates taxes when a shipping address is changed on an unfulfilled order. Previously, the address was saved but tax lines remained tied to the original destination, causing financial data mismatches. The recalculation is conditional: it applies only to fully unfulfilled orders that are eligible for editing. Partially fulfilled orders and orders ineligible for editing will have the address saved but taxes left unchanged. Subscribers to the relevant webhook will receive a notification when a tax recalculation occurs. No code changes are required to adopt this behavior.
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