curl --request GET \
  --url https://api.syntage.com/tax-returns/{id} \
  --header 'X-API-Key: <api-key>'

{
  "@context": "/contexts/TaxReturn",
  "@id": "/tax-returns/91106968-1abd-4d64-85c1-4e73d96fb997",
  "@type": "TaxReturn",
  "id": "91106968-1abd-4d64-85c1-4e73d96fb997",
  "taxpayer": {
    "@id": "/taxpayers/PEIC211118IS0",
    "@type": "Taxpayer",
    "id": "PEIC211118IS0",
    "personType": "physical",
    "registrationDate": "2023-12-25",
    "name": "Pedro Infante Cruz"
  },
  "operationNumber": 200100172932,
  "intervalUnit": "Mensual",
  "period": "Diciembre",
  "fiscalYear": 2019,
  "type": "Complementaria",
  "complementary": "Modificación de Obligaciones",
  "presentedAt": "2023-11-07T05:31:56Z",
  "captureLine": "042007HZ795527888246",
  "files": [
    {
      "@id": "/files/91106968-1abd-4d64-85c1-4e73d96fb997",
      "@type": "File",
      "id": "91106968-1abd-4d64-85c1-4e73d96fb997",
      "type": "<string>",
      "resource": "<string>",
      "mimeType": "<string>",
      "extension": "<string>",
      "size": 40544,
      "filename": "<string>",
      "createdAt": "2020-01-01T12:15:00.000Z",
      "updatedAt": "2020-01-01T12:15:00.000Z"
    }
  ],
  "payment": {
    "dueAmount": 53249.8,
    "dueDate": "2019-01-03T21:10:40.000Z",
    "code": "0777555544443332222",
    "bank": "BBVA Bancomer, S.A.",
    "paidAmount": 123,
    "date": "2023-11-07T05:31:56Z",
    "operationNumber": "123456"
  },
  "createdAt": "2020-01-01T12:15:00.000Z",
  "updatedAt": "2020-01-01T12:15:00.000Z"
}