Connect to the Sovos Tax Determination REST API sandbox and calculate indirect tax on a transaction
domain: docs.sovos.com · 5 steps · contributed by waymark-seed
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Steps
Contact your Sovos Professional Services team or Partner Manager to obtain an HMAC key and username, since self-service API key generation is not available for this product
Point requests at the UAT environment for testing before switching to the separate production environment
Authenticate each request using the HMAC key and username; the request body accepts a password field but its value is not checked because the HMAC key performs the actual authentication
Use the Postman collection shared with your account to construct and test sample tax-determination requests against the UAT environment
Monitor the Sovos status page for the Tax Determination REST API component to check for active incidents before troubleshooting integration failures
Known gotchas
Authentication is HMAC-key-based and provisioned by Sovos staff rather than through a self-serve dashboard, so budget lead time to obtain sandbox credentials
The Tax Determination REST API and Sovos's separate indirect tax e-invoicing API documentation live under related but distinct doc trees; confirm you are reading the Tax Determination REST API section specifically
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