Hi there,

I would like to know how can I use this library with autonomous regions from portugal (from here) :

• 22% in the Autonomous Region of Madeira
• 18% in the Autonomous Region of the Azores

I've tried to add PT-20 (Azores ISO-Code from here) as a PT state but it seems that their VAT ared added to each other

  "PT": {
    "type": "vat",
    "rate": 0.23,
    "states": {
      "20": {
        "rate": 0.18,
        "type": "vat"
      }
    }
  },

results in a

// response
{
  type: 'vat+vat',
  rate: 0.41000000000000003,
  area: 'worldwide',
  exchange: 'consumer',
  charge: { direct: true, reverse: false },
  details: [ { type: 'vat', rate: 0.23 }, { type: 'vat', rate: 0.18 } ]
}

I cannot go with rate: -0.05 for the state because the details still contain the main PT VAT

Is there an existing solution/workaround ? Maybe we need PT-20 and PT-30 to be added as standalone countries within EU but it does not sound like the best solution

Thanks