CreateDocumentRequest

{
    "documentType": "388",
    "documentNo": "INV-2026-001",
    "issueDate": "2026-06-15",
    "buyer": {
        "name": "บริษัท ลูกค้า จำกัด",
        "taxId": "0105567123456",
        "taxIdSchemeId": "TXID",
        "branchNo": "00000",
        "address": {
            "addressLine1": "99/9 ถนนสุขุมวิท",
            "subDistrict": "คลองตัน",
            "district": "คลองเตย",
            "province": "กรุงเทพมหานคร",
            "postalCode": "10110",
            "countryCode": "TH"
        },
        "email": "buyer@example.com",
        "phone": "0812345678"
    },
    "items": [
        {
            "sequence": 1,
            "productCode": "PRD-001",
            "productName": "บริการพัฒนาซอฟต์แวร์",
            "quantity": 1,
            "unitName": "งาน",
            "unitPrice": 10000,
            "vatRate": 7,
            "discountAmount": 0,
            "total": 10000
        }
    ],
    "vatIncluded": false,
    "emailAddress1": "user@example.com",
    "smsTelNo": "string"
}