INSUFFICIENT_PERMISSION on Taxitem

Hi There

Would anyone have ideas on how to solve this one?

Error Received during Netsuite Execute Code: INSUFFICIENT_PERMISSION Type: ERROR Message: You do not have permissions to set a value for element taxitem due to one of the following reasons: 1) The field is read-only; 2) An associated feature is disabled; 3) The field is available either when a record is created or updated, but not in both cases

Many Thanks

<soapenv:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><soapenv:Header><tokenPassport xmlns="urn:messages_2023_1.platform.webservices.netsuite.com" soapenv:mustUnderstand="0" soapenv:actor="http://schemas.xmlsoap.org/soap/actor/next"><ns2:account xmlns:ns2="urn:core_2023_1.platform.webservices.netsuite.com">4011438_SB1</ns2:account><ns2:consumerKey xmlns:ns2="urn:core_2023_1.platform.webservices.netsuite.com">****************************************************************</ns2:consumerKey><ns2:token xmlns:ns2="urn:core_2023_1.platform.webservices.netsuite.com">****************************************************************</ns2:token><ns2:nonce xmlns:ns2="urn:core_2023_1.platform.webservices.netsuite.com">zJVun7EustcTCQIDc3fO</ns2:nonce><ns2:timestamp xmlns:ns2="urn:core_2023_1.platform.webservices.netsuite.com">1731947547</ns2:timestamp><ns2:signature xmlns:ns2="urn:core_2023_1.platform.webservices.netsuite.com" algorithm="HMAC_SHA256">********************************************</ns2:signature></tokenPassport></soapenv:Header><soapenv:Body><ns1:getSelectValue xmlns:ns1="urn:messages_2023_1.platform.webservices.netsuite.com"><ns1:fieldDescription xmlns:ns2="urn:core_2023_1.platform.webservices.netsuite.com"><ns2:field>taxItem</ns2:field><ns2:filter operator="is"><ns2:filterValue>UNDEF-GB</ns2:filterValue></ns2:filter><ns2:recordType>invoice</ns2:recordType></ns1:fieldDescription><ns1:pageIndex>0</ns1:pageIndex></ns1:getSelectValue></soapenv:Body></soapenv:Envelope>