curl --request POST \
  --url https://api.melso.ai/v1/companies/{company_id}/tax-calendar/mark-filed \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "obligation_id": "<string>",
  "period": "2026-Q3"
}
'

import requests

url = "https://api.melso.ai/v1/companies/{company_id}/tax-calendar/mark-filed"

payload = {
    "obligation_id": "<string>",
    "period": "2026-Q3"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({obligation_id: '<string>', period: '2026-Q3'})
};

fetch('https://api.melso.ai/v1/companies/{company_id}/tax-calendar/mark-filed', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "obligation_id": "<string>",
  "period": "2026-Q3",
  "filing_status": "filed"
}

{
  "error": "lines[0].vat_rate must be 21, 10, 4 or 0",
  "code": "invalid_invoice",
  "request_id": "req_01JAB3K9X2"
}

{
  "error": "invalid token",
  "code": "unauthorized",
  "request_id": "req_01JAB3K9X2"
}

{
  "error": "invoice not found",
  "code": "not_found",
  "request_id": "req_01JAB3K9X2"
}

{
  "error": "The tax return changed or is not ready for approval",
  "code": "version_conflict",
  "request_id": "req_01JAB3K9X2"
}