{"ok":true,"commandType":"cancel-sales-invoice","module":"Sales","mode":"write","summary":"Cancel a sales invoice when AutoCount allows it.","payloadSchema":{"docNo":"required document number","reason":"optional cancellation reason"},"examplePayload":{"docNo":"IV-000001","reason":"cancelled by API request"},"notes":"Cancellation depends on AutoCount posting/link status and account-book permissions.","nativePayload":{"supported":false,"sections":[{"name":"Master","fields":[]},{"name":"Details","fields":[]},{"name":"KnockOffDetails","fields":[]},{"name":"TransferDetails","fields":[]},{"name":"PaymentDetails","fields":[]},{"name":"Options","fields":[]}]}}