• We added support for stateProv as an alternative to statePrv when you specify the state or province in customer or vendor registration numbers. If you already use statePrv in your integrations, no changes are required.

• We added the x-request-id header to all tax calculation endpoint responses. You can now use this header to match requests and responses when troubleshooting integrations.

We fixed the /calcTax/quote endpoint, which was using line-level calculation instead of document-level. The /calcTax/quote endpoint now uses document-level calculation, consistent with the standard tax calculation endpoints.