使用 PDF Vector 和 Google Drive 的自动化收据处理与税务分类

• •Google Drive API 凭证
• •Google Sheets API 凭证

{
  "meta": {
    "instanceId": "placeholder"
  },
  "nodes": [
    {
      "id": "overview-note",
      "name": "收据概览",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        50,
        50
      ],
      "parameters": {
        "color": 5,
        "width": 350,
        "height": 180,
        "content": "## 🧾 收据与税务追踪器"
      },
      "typeVersion": 1
    },
    {
      "id": "input-note",
      "name": "输入来源",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        450,
        450
      ],
      "parameters": {
        "width": 250,
        "height": 150,
        "content": "## 📸 收据输入"
      },
      "typeVersion": 1
    },
    {
      "id": "tax-note",
      "name": "税务类别",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        850,
        450
      ],
      "parameters": {
        "color": 4,
        "width": 260,
        "height": 160,
        "content": "## 💰 税务逻辑"
      },
      "typeVersion": 1
    },
    {
      "id": "manual-trigger",
      "name": "手动触发器",
      "type": "n8n-nodes-base.manualTrigger",
      "notes": "Process receipt",
      "position": [
        250,
        300
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "google-drive",
      "name": "Google Drive - 获取收据",
      "type": "n8n-nodes-base.googleDrive",
      "notes": "Retrieve receipt from Drive",
      "position": [
        450,
        300
      ],
      "parameters": {
        "fileId": "={{ $json.fileId }}",
        "operation": "download"
      },
      "typeVersion": 3
    },
    {
      "id": "pdfvector-extract",
      "name": "PDF Vector - 提取收据",
      "type": "n8n-nodes-pdfvector.pdfVector",
      "notes": "Extract receipt data",
      "position": [
        650,
        300
      ],
      "parameters": {
        "prompt": "Extract all receipt information from this document or image including merchant name and address, transaction date and time, all items with descriptions and prices, subtotal, tax amount and rate, tip if applicable, total amount, payment method, and any loyalty or membership numbers. Use OCR if this is a scanned receipt or image.",
        "schema": "{\"type\":\"object\",\"properties\":{\"merchant\":{\"type\":\"object\",\"properties\":{\"name\":{\"type\":\"string\"},\"address\":{\"type\":\"string\"},\"phone\":{\"type\":\"string\"},\"taxId\":{\"type\":\"string\"}}},\"transaction\":{\"type\":\"object\",\"properties\":{\"date\":{\"type\":\"string\"},\"time\":{\"type\":\"string\"},\"receiptNumber\":{\"type\":\"string\"},\"cashier\":{\"type\":\"string\"}}},\"items\":{\"type\":\"array\",\"items\":{\"type\":\"object\",\"properties\":{\"name\":{\"type\":\"string\"},\"description\":{\"type\":\"string\"},\"quantity\":{\"type\":\"number\"},\"unitPrice\":{\"type\":\"number\"},\"totalPrice\":{\"type\":\"number\"},\"taxable\":{\"type\":\"boolean\"}}}},\"financial\":{\"type\":\"object\",\"properties\":{\"subtotal\":{\"type\":\"number\"},\"taxRate\":{\"type\":\"number\"},\"taxAmount\":{\"type\":\"number\"},\"tip\":{\"type\":\"number\"},\"total\":{\"type\":\"number\"},\"currency\":{\"type\":\"string\"}}},\"payment\":{\"type\":\"object\",\"properties\":{\"method\":{\"type\":\"string\"},\"lastFourDigits\":{\"type\":\"string\"},\"authCode\":{\"type\":\"string\"}}},\"loyalty\":{\"type\":\"object\",\"properties\":{\"memberNumber\":{\"type\":\"string\"},\"pointsEarned\":{\"type\":\"number\"},\"pointsBalance\":{\"type\":\"number\"}}}},\"required\":[\"merchant\",\"financial\"],\"additionalProperties\":false}",
        "resource": "document",
        "inputType": "file",
        "operation": "extract",
        "binaryPropertyName": "data"
      },
      "typeVersion": 1
    },
    {
      "id": "pdfvector-categorize",
      "name": "PDF Vector - 税务分类",
      "type": "n8n-nodes-pdfvector.pdfVector",
      "notes": "Categorize for taxes",
      "position": [
        850,
        300
      ],
      "parameters": {
        "prompt": "Based on this receipt document or image, determine: 1) The most appropriate tax category (meals, travel, supplies, equipment, etc.), 2) Whether this is likely tax deductible for business, 3) If this is a meal receipt, what percentage would typically be deductible, 4) Any special considerations for tax purposes. Process any image format using OCR if needed.",
        "resource": "document",
        "inputType": "file",
        "operation": "ask",
        "binaryPropertyName": "data"
      },
      "typeVersion": 1
    },
    {
      "id": "process-expense",
      "name": "处理费用数据",
      "type": "n8n-nodes-base.code",
      "notes": "Validate and categorize",
      "position": [
        1050,
        300
      ],
      "parameters": {
        "jsCode": "// Process receipt data and tax categorization\nconst receiptData = $node['PDF Vector - Extract Receipt'].json.data;\nconst taxCategory = $node['PDF Vector - Tax Categorization'].json.answer;\n\n// Validate financial calculations\nlet validationErrors = [];\nif (receiptData.items && receiptData.items.length > 0) {\n  const calculatedSubtotal = receiptData.items.reduce((sum, item) => sum + (item.totalPrice || 0), 0);\n  if (Math.abs(calculatedSubtotal - receiptData.financial.subtotal) > 0.02) {\n    validationErrors.push('Item totals do not match subtotal');\n  }\n}\n\n// Calculate tax consistency\nconst expectedTax = receiptData.financial.subtotal * (receiptData.financial.taxRate / 100);\nif (Math.abs(expectedTax - receiptData.financial.taxAmount) > 0.02) {\n  validationErrors.push('Tax calculation inconsistency');\n}\n\n// Determine expense category and deductibility\nlet expenseCategory = 'Other';\nlet deductiblePercentage = 100;\nlet taxNotes = '';\n\nif (taxCategory.toLowerCase().includes('meal')) {\n  expenseCategory = 'Meals & Entertainment';\n  deductiblePercentage = 50; // Typical meal deduction\n  taxNotes = 'Business meal - 50% deductible';\n} else if (taxCategory.toLowerCase().includes('travel')) {\n  expenseCategory = 'Travel';\n  deductiblePercentage = 100;\n  taxNotes = 'Business travel expense';\n} else if (taxCategory.toLowerCase().includes('supplies')) {\n  expenseCategory = 'Office Supplies';\n  deductiblePercentage = 100;\n  taxNotes = 'Business supplies';\n}\n\n// Create processed expense record\nconst processedExpense = {\n  // Receipt data\n  merchant: receiptData.merchant.name,\n  date: receiptData.transaction.date,\n  amount: receiptData.financial.total,\n  currency: receiptData.financial.currency || 'USD',\n  \n  // Tax information\n  expenseCategory,\n  deductiblePercentage,\n  deductibleAmount: (receiptData.financial.total * deductiblePercentage / 100).toFixed(2),\n  taxNotes,\n  \n  // Original data\n  originalReceipt: receiptData,\n  aiCategorization: taxCategory,\n  \n  // Validation\n  isValid: validationErrors.length === 0,\n  validationErrors,\n  \n  // Metadata\n  processedAt: new Date().toISOString(),\n  taxYear: new Date(receiptData.transaction.date).getFullYear()\n};\n\nreturn [{ json: processedExpense }];"
      },
      "typeVersion": 2
    },
    {
      "id": "save-spreadsheet",
      "name": "保存到费用表",
      "type": "n8n-nodes-base.googleSheets",
      "notes": "Track in spreadsheet",
      "position": [
        1250,
        300
      ],
      "parameters": {
        "data": "={{ [[$json.date, $json.merchant, $json.expenseCategory, $json.amount, $json.deductibleAmount, $json.deductiblePercentage + '%', $json.taxNotes, $json.processedAt]] }}",
        "range": "A:H",
        "sheetId": "{{ $json.taxYear }}-expenses",
        "operation": "append"
      },
      "typeVersion": 1
    }
  ],
  "connections": {
    "Manual Trigger": {
      "main": [
        [
          {
            "node": "Google Drive - Get Receipt",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Process Expense Data": {
      "main": [
        [
          {
            "node": "Save to Expense Sheet",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Google Drive - Get Receipt": {
      "main": [
        [
          {
            "node": "PDF Vector - Extract Receipt",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "PDF Vector - Extract Receipt": {
      "main": [
        [
          {
            "node": "PDF Vector - Tax Categorization",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "PDF Vector - Tax Categorization": {
      "main": [
        [
          {
            "node": "Process Expense Data",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}