Tax parameter setting value

Each object in a tax parameter detail's settings list represents one historical value for that parameter, ordered from most recent effective date to oldest.

{
  "value": "M",
  "effective_start": "2021-03-15",
  "created_at": "2021-03-15T12:00:00.000000Z",
  "actor": {
    "party": "employee"
  }
}