AdjustmentDocRequest

Create a Debit Note ("80") or Credit Note ("81") referencing a tax invoice.

{
    "documentType": "81",
    "items": [
        {
            "correctedQuantity": 2,
            "correctedUnitPrice": 900,
            "lineId": 1,
            "originalUnitPrice": 1000,
            "productName": "บริการที่ปรึกษา",
            "quantity": 2,
            "unit": "ครั้ง",
            "vatRate": 7,
            "vatTypeCode": "VAT"
        }
    ],
    "purposeCode": "CDAB",
    "purposeText": "ลดราคาสินค้า",
    "referenceDocumentDate": "2026-06-10",
    "referenceDocumentId": "11111111-1111-1111-1111-111111111111",
    "referenceDocumentNo": "INV-2026-0001",
    "referenceDocumentTypeCode": "388",
    "templateNo": "INV-7QX2K9"
}