In API version v.2026-01-27 we have adjusted how the api/v1/payments endpoint calculates tax.

Updated Endpoints

Tax calculation changes:

• POST payments

Tax Calculation Changes

Made changes to how tax is calculated based on the request object, this change was made to make tax more intuitive by only allowing automated calculation to occur when explicitly defined with auto.

POST Payments

The payments tax calculation logic has been changed.

• Return value calculation changes:
  • tax: Tax is no longer automatically calculated when tax field is not included in request, if tax is not included in the request the calculated tax will be set to 0. Tax will still be automatically calculated if tax is auto in the request.