curl --request POST \
  --url https://dev.intermezzo.ai/organizations/{organization_id}/tax-identifiers \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{}'

{
  "id": 123,
  "validFrom": "2023-12-25",
  "validTo": "2023-12-25",
  "taxData": {
    "country": "<string>",
    "validFrom": "2023-12-25",
    "validTo": "2023-12-25",
    "taxNumber": "<string>",
    "businessType": 170,
    "isEmployeeFlatTax": false,
    "isEmployeeMiniJobFlatTax": false,
    "taxFilingFrequency": "monthly"
  }
}