Validate taxes on a billing schedule

{
  "customerId": "cca32597-b6b0-4499-9669-128aef8702e4",
  "startDate": "2022-01-01",
  "endDate": "2022-12-31",
  "recurrenceDayOfMonth": 1,
  "taxRates": [
    {
      "priceId": "bc61d4b8-e9d6-4f4a-9bcf-f5dae874c730",
      "taxRateId": "50c0d53b-8460-41e6-b4e9-a4e157fc1a64"
    }
  ],
  "autoIssueInvoices": false,
  "purchaseOrderNumber": "PO123",
  "reference": "Example reference",
  "label": "Example label",
  "paymentProvider": "STRIPE",
  "isDraft": true,
  "rollUpBilling": false,
  "phases": [
    {
      "name": "Trial Period",
      "externalContractRef": "ACME-2022-MSA",
      "priceIds": [
        "6dc54805-0ac8-4f17-9341-4d3f2db9dcd8"
      ],
      "startDate": "2022-01-01",
      "endDate": "2022-06-30",
      "discounts": [
        {
          "restrictToPrices": [
            "6dc54805-0ac8-4f17-9341-4d3f2db9dcd8"
          ],
          "type": "PERCENTAGE",
          "amount": 8,
          "message": "8% Discount",
          "separateLineItem": true,
          "seatDiscountType": "ALL_SEATS"
        }
      ],
      "minimums": [
        {
          "restrictToPrices": [
            "9fe9986b-e205-42b7-a58f-42845c91f03f"
          ],
          "amount": 100
        }
      ],
      "creditGrants": [
        {
          "name": "Monthly usage credits",
          "creditUnitType": "CURRENCY",
          "currency": "GBP",
          "amount": 100,
          "costOfCredit": 0,
          "taxRateId": "179d1ab3-cc96-48e2-9310-067b0b42d47c",
          "grantRefreshFrequency": "MONTHLY",
          "billingFrequency": "MONTHLY",
          "rolloverMode": "NONE",
          "restrictToPrices": [
            "0199ca89-2d9e-7e3d-914c-7de86e8fc7ce"
          ]
        }
      ],
      "listPriceIds": [
        "45e16eb7-2170-4632-b04f-9ecd90b85b1e"
      ],
      "recurrencePreference": "CONTINUE_FROM_PREVIOUS_PHASE",
      "phasePriceMetadata": [
        {
          "priceId": "6dc54805-0ac8-4f17-9341-4d3f2db9dcd8",
          "arrCalculation": "INCLUDE"
        }
      ],
      "phaseListPriceMetadata": [
        {
          "listPriceId": "45e16eb7-2170-4632-b04f-9ecd90b85b1e",
          "arrCalculation": "INCLUDE"
        }
      ]
    },
    {
      "priceIds": [],
      "startDate": "2022-07-01",
      "endDate": "2022-12-31",
      "discounts": [],
      "minimums": [
        {
          "restrictToPrices": [
            "9fe9986b-e205-42b7-a58f-42845c91f03f"
          ],
          "amount": 100
        }
      ],
      "listPriceIds": [
        "45e16eb7-2170-4632-b04f-9ecd90b85b1e"
      ],
      "recurrencePreference": "CONTINUE_FROM_PREVIOUS_PHASE",
      "phasePriceMetadata": [
        {
          "priceId": "6dc54805-0ac8-4f17-9341-4d3f2db9dcd8",
          "arrCalculation": "INCLUDE"
        }
      ],
      "phaseListPriceMetadata": [
        {
          "listPriceId": "45e16eb7-2170-4632-b04f-9ecd90b85b1e",
          "arrCalculation": "INCLUDE"
        }
      ]
    }
  ],
  "attachmentAssetIds": [
    "5055cd17-d5e8-4286-bddf-79729ddabf51"
  ],
  "autoCharge": true,
  "defaultDueDateDays": 30,
  "memo": "Example Billing Schedule",
  "customFields": {
    "key": "value"
  }
}