Hi, This is still not working and we have done a lot of testing with the json posted, I have removed one by one field from the code for finding what is affecting why CustomerVATZone are not posted. When we post with the shipVia field CustomerVATZone are not posted, without the shipVia, the customerVATZone are posted. Ex: }, "shipVia": { "value": "UPS STANDARD" }, Please test this and confirm if this is a bug.
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