Unable to populate Income Type using API

The  Income Type field does not seem to exist in the API under EmployeePayrollDetails. I want to set it to Salary and Wages

when querying in postman I get this as a result in the EmployeePayrollDetails

using 

/Contact/EmployeePayrollDetails/701a2fe3-de5b-47f7-866c-7ce1a8b91914

it returns. The tax category does not seem to relate to the Income Type

 "Tax": {
        "TaxFileNumber": "xxx xxx xxx",
        "TaxTable": {
            "UID": "67d45c9f-41fd-4fc7-89f1-d27d4fb577cf",
            "Name": "Tax Free Threshold",
            "URI": "http://myob-server:8080/AccountRight/6123f68f-aa73-4737-a26e-390362664d0a/Payroll/PayrollCategory/TaxTable/67d45c9f-41fd-4fc7-89f1-d27d4fb577cf"
        },
        "WithholdingVariationRate": 0.000000,
        "TotalRebatesPerYear": 0.000,
        "ExtraTaxPerPay": 0.000,
        "TaxCategory": {
            "UID": "47dc880e-f8bd-4bf7-a070-359e61b5f152",
            "Name": "PAYG Withholding",
            "Type": "Tax",
            "URI": "http://myob-server:8080/AccountRight/6123f68f-aa73-4737-a26e-390362664d0a/Payroll/PayrollCategory/Tax/47dc880e-f8bd-4bf7-a070-359e61b5f152"
        }
    },

Is it not available to populate?