Tax summary webhook and calculation requests now include customer and company metafields
Shopify developer change
MerchantDiff detected this entry in Shopify's official developer changelog on April 01, 2026.
This Shopify update is categorized as API, New, Admin GraphQL API, Events & webhooks, 2026-04.
What changed
As of API version 2026-04, tax calculation requests for tax partner apps now include buyer metafields. These fields provide custom data associated with customers (for D2C orders) and companies (for B2B orders) that may affect tax calculations. This enhancement allows tax partners to access merchant-defined buyer attributes for more accurate tax determination and compliance reporting.
Who is affected
Apps that subscribe to or process Shopify webhooks or event payloads should review this change.
What action may be needed
Review whether the new capability is relevant to your app. If you plan to use it, test the affected API or workflow before adopting it in production.
Use the official Shopify entry below as the source of truth for technical implementation details, affected APIs, migration instructions and deadlines.
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