Tax Summary Webhook `created_at` Field Now Uses UTC Format

Tax Summary Webhook `created_at` Field Now Uses UTC Format

Shopify Updates: 

Understanding the Update

The created_at field from the tax_summaries/create webhook for tax partners will now return timestamps in UTC format. This change ensures consistent and precise time representation in your integrations. The new format includes a Z suffix to indicate UTC and retains millisecond precision.

Action Required

To accommodate this update, you need to update your parsing logic to correctly process the new timestamp format.

Format Changes: Before and After

Here’s a comparison of the created_at field format before and after the update:

  • Prior to 2026-01: {"id": 14, "shop_id": 1, "order_id": 7, "created_at": "2025-11-19T08:16:53-05:00", "summary": { ... }}
  • 2026-01 and Beyond: {"id": 14, "shop_id": 1, "order_id": 7, "created_at": "2025-11-19T13:16:53.784Z", "summary": { ... }}

Why Was This Change Made?

This change provides a standardized timestamp format, eliminates confusion around time zone conversions, and simplifies debugging across systems that interact with Shopify’s APIs.

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