Added vat exempt logic

[pepijn-vanvlaanderen]

Summary

What — What changes are introduced in this PR?

Added a vat exempt flag for the getTaxLines to use. It is based on the cart or order metadata or defaults to false.

Why — Why are these changes relevant or necessary?

In europe if you sell outside your counry VAT is exempt for businesses entering a valid VAT number. By adding this PR changes, you can easily set the metadata key of vat_exempt to true and make sure vat is not charged.

How — How have these changes been implemented?

Extended the normalizeTaxModuleContext, added retrieval of cart/order metadata to be passed to getItemsTaxLinesStep

Testing — How have these changes been tested, or how can the reviewer test the feature?

Wrote patches for client projects, also added an integration test.

Checklist

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---

Note

Introduces VAT exemption support driven by order/cart metadata.vat_exempt.

• Include metadata in cart/order query fields and pass through tax workflows
• Extend TaxCalculationContext with vat_exempt and populate it in normalizeTaxModuleContext
• Update SystemTaxService.getTaxLines to return 0% rates for items and shipping when vat_exempt is true
• Add integration test validating VAT-exempt behavior and a changeset for core-flows, tax, and types

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[changeset-bot]

🦋 Changeset detected

Latest commit: 38f41b3

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 76 packages

Name	Type
@medusajs/core-flows	Patch
@medusajs/tax	Patch
@medusajs/types	Patch
@medusajs/medusa	Patch
@medusajs/test-utils	Patch
integration-tests-http	Patch
@medusajs/event-bus-redis	Patch
@medusajs/draft-order	Patch
@medusajs/framework	Patch
@medusajs/js-sdk	Patch
@medusajs/modules-sdk	Patch
@medusajs/orchestration	Patch
@medusajs/utils	Patch
@medusajs/workflows-sdk	Patch
@medusajs/medusa-oas-cli	Patch
@medusajs/admin-bundler	Patch
@medusajs/dashboard	Patch
@medusajs/analytics	Patch
@medusajs/api-key	Patch
@medusajs/auth	Patch
@medusajs/caching	Patch
@medusajs/cart	Patch
@medusajs/currency	Patch
@medusajs/customer	Patch
@medusajs/file	Patch
@medusajs/fulfillment	Patch
@medusajs/index	Patch
@medusajs/inventory	Patch
@medusajs/link-modules	Patch
@medusajs/locking	Patch
@medusajs/notification	Patch
@medusajs/order	Patch
@medusajs/payment	Patch
@medusajs/pricing	Patch
@medusajs/product	Patch
@medusajs/promotion	Patch
@medusajs/rbac	Patch
@medusajs/region	Patch
@medusajs/sales-channel	Patch
@medusajs/settings	Patch
@medusajs/stock-location	Patch
@medusajs/store	Patch
@medusajs/translation	Patch
@medusajs/user	Patch
@medusajs/workflow-engine-inmemory	Patch
@medusajs/workflow-engine-redis	Patch
@medusajs/cache-inmemory	Patch
@medusajs/cache-redis	Patch
@medusajs/event-bus-local	Patch
@medusajs/analytics-local	Patch
@medusajs/analytics-posthog	Patch
@medusajs/auth-emailpass	Patch
@medusajs/auth-github	Patch
@medusajs/auth-google	Patch
@medusajs/caching-redis	Patch
@medusajs/file-local	Patch
@medusajs/file-s3	Patch
@medusajs/fulfillment-manual	Patch
@medusajs/locking-postgres	Patch
@medusajs/locking-redis	Patch
@medusajs/notification-local	Patch
@medusajs/notification-sendgrid	Patch
@medusajs/payment-stripe	Patch
@medusajs/oas-github-ci	Patch
@medusajs/cli	Patch
@medusajs/deps	Patch
@medusajs/telemetry	Patch
@medusajs/admin-sdk	Patch
@medusajs/admin-shared	Patch
@medusajs/admin-vite-plugin	Patch
@medusajs/icons	Patch
@medusajs/toolbox	Patch
@medusajs/ui-preset	Patch
create-medusa-app	Patch
medusa-dev-cli	Patch
@medusajs/ui	Patch

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