curl --request POST \
  --url https://api.symmetry.com/spf/fillPdf \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "formId": "AL101",
  "employee": {
    "firstName": "John",
    "lastName": "Smith",
    "socialSecurityNumber": "123-45-6789",
    "address": {
      "streetAddress1": "11 S Union St",
      "city": "Montgomery",
      "state": "AL",
      "zipCode": "36130"
    }
  },
  "employer": {
    "name": "Symmetry",
    "federalEIN": "98-7654321",
    "telephoneNumber": "456-867-5309",
    "address": {
      "streetAddress1": "64 N Union St",
      "city": "Montgomery",
      "state": "AL",
      "zipCode": "36130"
    }
  },
  "fields": {
    "filingStatus": "SINGLE",
    "dependents": 1,
    "additionalStateWithholding": 25
  }
}
'

{
  "form": "AL101",
  "pdf": "BASE 64 PDF DATA...",
  "taxParameters": [
    {
      "id": "AL.dependents",
      "value": "0"
    },
    {
      "id": "AL.filingStatus",
      "value": "0"
    },
    {
      "id": "additionalStateWithholding",
      "value": "0.00"
    },
    {
      "id": "mustFileWithState",
      "value": "false"
    },
    {
      "id": "employerIntervention",
      "value": "false"
    },
    {
      "id": "employerInterventionReason",
      "value": "null"
    }
  ]
}