# Shopify orderUpdate recalculates taxes when an unfulfilled order's shipping address changes, as of 2026-10

- **Provider:** Shopify
- **Endpoint:** `POST /admin/api/{version}/graphql.json`
- **Effective:** 2026-10-01
- **Severity:** medium
- **Change:** version-sunset
- **Status:** unverified (secondary reports only; SHAPI does not open fix PRs for it)

## What changed

As of Admin API version 2026-10, changing the shipping address of an unfulfilled order with orderUpdate recalculates its taxes and totals against the new destination. Before, the tax lines were left unchanged.

## What to do

After updating a shipping address, read the order's taxLines, totalTaxSet and totals again instead of assuming they are unchanged; reconcile any amounts your app stored.

## Sources

- Provider notice (2026-07-30): https://shopify.dev/changelog/updating-an-orders-shipping-address-returns-accurate-financial-data

## Machine-readable

- Advisory: https://github.com/SriVarshini09/shapi-advisories/blob/main/advisories/shopify-order-update-shipping-address-recalculates-taxes.json
- OSV: https://shapi.dev/osv/shopify-order-update-shipping-address-recalculates-taxes.json