{
  "practice_name": "Your Practice Name",
  "tax_year": "2026-27",
  "quarter_window": {
    "quarter": "Q1",
    "period_start": "2026-04-06",
    "period_end": "2026-07-05",
    "submission_deadline": "2026-08-05"
  },
  "bookkeeping_software": {
    "name": "Xero",
    "declared_at": "2026-04-01",
    "integration_path_confirmed": true
  },
  "clients": {
    "client_001": {
      "display_name": "Client Display Name",
      "mtd_status": "mandated",
      "combined_gross_income_ytd": 0.0,
      "hmrc_business_ids": {
        "self_employment": "X0000000000SE"
      },
      "bookkeeping_software": {
        "name": "Xero",
        "declared_at": "2026-04-01"
      },
      "property_ownership_percentage": 100.0,
      "former_fhl_properties": [],
      "adjustment_code_register": [],
      "submission_authorisation": {
        "reference": "AUTH-000001",
        "authorised_at": "2026-04-01T00:00:00Z",
        "method": "signed_engagement_letter",
        "authorized_by": "Partner Name"
      },
      "partner_acknowledgements": []
    }
  }
}