Tax Code error in the Payload

Hi ,

Good Day,

We are currently revising the integration for the E-Invoicing and we are currently encountering an error. See below screenshot for reference.

Payload:

{

  "externalId": "Shopee_230815PHDHAUEU_staging_postman",

  "entity": {

    "id": "2978",

    "entityId": "Shopee_230815PHDHAUEU"

  },

  "class": {

    "refName": "Managed Services : Outright : Non-FMCG : Levi's"

  },

  "currencyname": {

    "name": "Philippine Peso"

  },

  "custbody19": {

    "refName": "Sales Invoice"

  },

  "custbody4": {

    "refName": "4 Charlie Rose Hernandez"

  },

  "location": {

    "refName": "Warehouse"

  },

  "terms": {

    "refName": "Due on receipt"

  },

  "custbody_customer_first_name": "Shopee",

  "custbody_customer_last_name": "Customer 230815PHDHAUEU",

  "custbody_brand": "Levis",

  "item": {

    "items": [

      {

        "amount": 2312.5,

        "item": {

          "refName": "2950710617476"

        },

        "custcol_4601_witaxapplies": false,

        "quantity": 1,

        "orderLine": 1,

        "taxCode": "6",

        "price": {

          "id": "1",

          "refName": "Base Price"

        }

      }

    ]

  }

}