# Verify that the transaction uses the Avalara-calculated tax amount

Source: https://developer.avalara.com/vat-ecom/transactions/certification-requirements/verify-avalara-calculated-tax/

**Element type:** Required

**Endpoints/models used:** N/A

Confirm that the integration takes the `taxAmount` value from the transaction response and uses that to populate the tax field in the platform. Do NOT take our rate and use it to calculate the tax within the platform itself.