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extract-ct600-data

Extract structured fields from ct600 documents.

The English summary is being prepared. Showing the original description.

iterationlayer/skills

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SKILL.md (original)

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Extract CT600 Data

Tax and finance teams use this recipe to extract CT600 fields from official forms into structured JSON for review, routing, and downstream filing preparation.

APIs Used

Document Extraction (1 credit per page)

Prerequisites

You need an Iteration Layer API key. Get one at platform.iterationlayer.com during the 7-day trial.

For full integration guidance (SDKs, auth, MCP, error handling), see the Iteration Layer Integration Guide.

Implementation

curl -X POST https://api.iterationlayer.com/document-extraction/v1/extract \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "files": [
    {
      "type": "url",
      "name": "ct600.pdf",
      "url": "https://example.com/documents/ct600-sample.pdf"
    }
  ],
  "schema": {
    "fields": [
      {
        "name": "taxpayer_name",
        "type": "TEXT",
        "description": "Taxpayer, filer, or recipient name"
      },
      {
        "name": "taxpayer_identifier",
        "type": "TEXT",
        "description": "Taxpayer identifier"
      },
      {
        "name": "issuer_or_authority",
        "type": "TEXT",
        "description": "Employer, payer, or tax authority"
      },
      {
        "name": "tax_period",
        "type": "TEXT",
        "description": "Tax year or filing period"
      },
      {
        "name": "tax_lines",
        "type": "ARRAY",
        "description": "Reported tax lines",
        "fields": [
          {
            "name": "code",
            "type": "TEXT",
            "description": "Box, line, or tax code"
          },
          {
            "name": "description",
            "type": "TEXT",
            "description": "Line description"
          },
          {
            "name": "amount",
            "type": "CURRENCY_AMOUNT",
            "description": "Reported amount"
          }
        ]
      },
      {
        "name": "taxable_amount",
        "type": "CURRENCY_AMOUNT",
        "description": "Taxable amount or tax base"
      },
      {
        "name": "tax_due_or_withheld",
        "type": "CURRENCY_AMOUNT",
        "description": "Tax due, assessed, or withheld"
      },
      {
        "name": "currency",
        "type": "CURRENCY_CODE",
        "description": "Currency code"
      }
    ]
  }
}'

import { IterationLayer } from "iterationlayer";

const client = new IterationLayer({ apiKey: "YOUR_API_KEY" });

const result = await client.extractDocument({
  "files": [
    {
      "type": "url",
      "name": "ct600.pdf",
      "url": "https://example.com/documents/ct600-sample.pdf"
    }
  ],
  "schema": {
    "fields": [
      {
        "name": "taxpayer_name",
        "type": "TEXT",
        "description": "Taxpayer, filer, or recipient name"
      },
      {
        "name": "taxpayer_identifier",
        "type": "TEXT",
        "description": "Taxpayer identifier"
      },
      {
        "name": "issuer_or_authority",
        "type": "TEXT",
        "description": "Employer, payer, or tax authority"
      },
      {
        "name": "tax_period",
        "type": "TEXT",
        "description": "Tax year or filing period"
      },
      {
        "name": "tax_lines",
        "type": "ARRAY",
        "description": "Reported tax lines",
        "fields": [
          {
            "name": "code",
            "type": "TEXT",
            "description": "Box, line, or tax code"
          },
          {
            "name": "description",
            "type": "TEXT",
            "description": "Line description"
          },
          {
            "name": "amount",
            "type": "CURRENCY_AMOUNT",
            "description": "Reported amount"
          }
        ]
      },
      {
        "name": "taxable_amount",
        "type": "CURRENCY_AMOUNT",
        "description": "Taxable amount or tax base"
      },
      {
        "name": "tax_due_or_withheld",
        "type": "CURRENCY_AMOUNT",
        "description": "Tax due, assessed, or withheld"
      },
      {
        "name": "currency",
        "type": "CURRENCY_CODE",
        "description": "Currency code"
      }
    ]
  }
});

from iterationlayer import IterationLayer

client = IterationLayer(api_key="YOUR_API_KEY")

result = client.extract_document(**{
  "files": [
    {
      "type": "url",
      "name": "ct600.pdf",
      "url": "https://example.com/documents/ct600-sample.pdf"
    }
  ],
  "schema": {
    "fields": [
      {
        "name": "taxpayer_name",
        "type": "TEXT",
        "description": "Taxpayer, filer, or recipient name"
      },
      {
        "name": "taxpayer_identifier",
        "type": "TEXT",
        "description": "Taxpayer identifier"
      },
      {
        "name": "issuer_or_authority",
        "type": "TEXT",
        "description": "Employer, payer, or tax authority"
      },
      {
        "name": "tax_period",
        "type": "TEXT",
        "description": "Tax year or filing period"
      },
      {
        "name": "tax_lines",
        "type": "ARRAY",
        "description": "Reported tax lines",
        "fields": [
          {
            "name": "code",
            "type": "TEXT",
            "description": "Box, line, or tax code"
          },
          {
            "name": "description",
            "type": "TEXT",
            "description": "Line description"
          },
          {
            "name": "amount",
            "type": "CURRENCY_AMOUNT",
            "description": "Reported amount"
          }
        ]
      },
      {
        "name": "taxable_amount",
        "type": "CURRENCY_AMOUNT",
        "description": "Taxable amount or tax base"
      },
      {
        "name": "tax_due_or_withheld",
        "type": "CURRENCY_AMOUNT",
        "description": "Tax due, assessed, or withheld"
      },
      {
        "name": "currency",
        "type": "CURRENCY_CODE",
        "description": "Currency code"
      }
    ]
  }
})

package main

import il "github.com/iterationlayer/sdk-go"

func main() {
	client := il.NewClient("YOUR_API_KEY")

	result, err := client.ExtractDocument(il.ExtractDocumentRequest{
		Files: []il.FileInput{
			il.FileInput{
				Type: "url",
				Name: "ct600.pdf",
				Url: "https://example.com/documents/ct600-sample.pdf",
			},
		},
		Schema: il.ExtractionSchema{
			Fields: []any{
				il.TextFieldConfig{
					Name: "taxpayer_name",
					Type: "TEXT",
					Description: "Taxpayer, filer, or recipient name",
				},
				il.TextFieldConfig{
					Name: "taxpayer_identifier",
					Type: "TEXT",
					Description: "Taxpayer identifier",
				},
				il.TextFieldConfig{
					Name: "issuer_or_authority",
					Type: "TEXT",
					Description: "Employer, payer, or tax authority",
				},
				il.TextFieldConfig{
					Name: "tax_period",
					Type: "TEXT",
					Description: "Tax year or filing period",
				},
				il.ArrayFieldConfig{
					Name: "tax_lines",
					Type: "ARRAY",
					Description: "Reported tax lines",
					Fields: []any{
						il.TextFieldConfig{
							Name: "code",
							Type: "TEXT",
							Description: "Box, line, or tax code",
						},
						il.TextFieldConfig{
							Name: "description",
							Type: "TEXT",
							Description: "Line description",
						},
						il.CurrencyAmountFieldConfig{
							Name: "amount",
							Type: "CURRENCY_AMOUNT",
							Description: "Reported amount",
						},
					},
				},
				il.CurrencyAmountFieldConfig{
					Name: "taxable_amount",
					Type: "CURRENCY_AMOUNT",
					Description: "Taxable amount or tax base",
				},
				il.CurrencyAmountFieldConfig{
					Name: "tax_due_or_withheld",
					Type: "CURRENCY_AMOUNT",
					Description: "Tax due, assessed, or withheld",
				},
				il.CurrencyCodeFieldConfig{
					Name: "currency",
					Type: "CURRENCY_CODE",
					Description: "Currency code",
				},
			},
		},
	})
	if err != nil {
		panic(err)
	}

	_ = result
}

{
  "name": "Extract CT600 Data",
  "nodes": [
    {
      "parameters": {
        "content": "## Extract CT600 Data\n\nTax and finance teams use this recipe to extract CT600 fields from official forms into structured JSON for review, routing, and downstream filing preparation.\n\n**Note:** This workflow uses the Iteration Layer community node (`n8n-nodes-iterationlayer`). Install it via Settings > Community Nodes on self-hosted n8n, or add it directly on n8n Cloud with Verified Community Nodes enabled.",
        "height": 280,
        "width": 500,
        "color": 2
      },
      "type": "n8n-nodes-base.stickyNote",
      "typeVersion": 1,
      "position": [
        200,
        40
      ],
      "id": "extract-ct600-data-overview",
      "name": "Overview"
    },
    {
      "parameters": {},
      "type": "n8n-nodes-base.manualTrigger",
      "typeVersion": 1,
      "position": [
        250,
        300
      ],
      "id": "extract-ct600-data-trigger",
      "name": "Manual Trigger"
    },
    {
      "parameters": {
        "resource": "documentExtraction",
        "schemaInputMode": "rawJson",
        "schemaJson": "{\n  \"fields\": [\n    {\n      \"name\": \"taxpayer_name\",\n      \"type\": \"TEXT\",\n      \"description\": \"Taxpayer, filer, or recipient name\"\n    },\n    {\n      \"name\": \"taxpayer_identifier\",\n      \"type\": \"TEXT\",\n      \"description\": \"Taxpayer identifier\"\n    },\n    {\n      \"name\": \"issuer_or_authority\",\n      \"type\": \"TEXT\",\n      \"description\": \"Employer, payer, or tax authority\"\n    },\n    {\n      \"name\": \"tax_period\",\n      \"type\": \"TEXT\",\n      \"description\": \"Tax year or filing period\"\n    },\n    {\n      \"name\": \"tax_lines\",\n      \"type\": \"ARRAY\",\n      \"description\": \"Reported tax lines\",\n      \"fields\": [\n        {\n          \"name\": \"code\",\n          \"type\": \"TEXT\",\n          \"description\": \"Box, line, or tax code\"\n        },\n        {\n          \"name\": \"description\",\n          \"type\": \"TEXT\",\n          \"description\": \"Line description\"\n        },\n        {\n          \"name\": \"amount\",\n          \"type\": \"CURRENCY_AMOUNT\",\n          \"description\": \"Reported amount\"\n        }\n      ]\n    },\n    {\n      \"name\": \"taxable_amount\",\n      \"type\": \"CURRENCY_AMOUNT\",\n      \"description\": \"Taxable amount or tax base\"\n    },\n    {\n      \"name\": \"tax_due_or_withheld\",\n      \"type\": \"CURRENCY_AMOUNT\",\n      \"description\": \"Tax due, assessed, or withheld\"\n    },\n    {\n      \"name\": \"currency\",\n      \"type\": \"CURRENCY_CODE\",\n      \"description\": \"Currency code\"\n    }\n  ]\n}",
        "files": {
          "fileValues": [
            {
              "fileInputMode": "url",
              "fileName": "ct600.pdf",
              "fileUrl": "https://example.com/documents/ct600-sample.pdf"
            }
          ]
        }
      },
      "type": "n8n-nodes-iterationlayer.iterationLayer",
      "typeVersion": 1,
      "position": [
        500,
        300
      ],
      "id": "extract-ct600-data-extract",
      "name": "Extract Data",
      "credentials": {
        "iterationLayerApi": {
          "id": "1",
          "name": "Iteration Layer API"
        }
      }
    }
  ],
  "connections": {
    "Manual Trigger": {
      "main": [
        [
          {
            "node": "Extract Data",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "settings": {
    "executionOrder": "v1"
  }
}

Extract ct600 data from the file at [file URL]. Use the extract_document tool with these fields:

- taxpayer_name (TEXT): Taxpayer, filer, or recipient name
- taxpayer_identifier (TEXT): Taxpayer identifier
- issuer_or_authority (TEXT): Employer, payer, or tax authority
- tax_period (TEXT): Tax year or filing period
- tax_lines (ARRAY): Each with code (TEXT), description (TEXT), amount (CURRENCY_AMOUNT)
- taxable_amount (CURRENCY_AMOUNT): Taxable amount or tax base
- tax_due_or_withheld (CURRENCY_AMOUNT): Tax due, assessed, or withheld
- currency (CURRENCY_CODE): Currency code

Response

{
  "success": true,
  "data": {
    "taxpayer_name": {
      "value": "Taxpayer Name",
      "confidence": 0.97,
      "citations": [
        "TAXPAYER NAME"
      ]
    },
    "taxpayer_identifier": {
      "value": "Taxpayer Identifier",
      "confidence": 0.97,
      "citations": [
        "TAXPAYER IDENTIFIER"
      ]
    },
    "issuer_or_authority": {
      "value": "Issuer Or Authority",
      "confidence": 0.97,
      "citations": [
        "ISSUER OR AUTHORITY"
      ]
    },
    "tax_period": {
      "value": "Tax Period",
      "confidence": 0.97,
      "citations": [
        "TAX PERIOD"
      ]
    },
    "tax_lines": {
      "value": [
        {
          "code": {
            "value": "Code",
            "confidence": 0.96,
            "citations": [
              "CODE"
            ]
          },
          "description": {
            "value": "Description",
            "confidence": 0.96,
            "citations": [
              "DESCRIPTION"
            ]
          },
          "amount": {
            "value": {
              "amount": "1234.56",
              "currency": "GBP"
            },
            "confidence": 0.96,
            "citations": [
              "GBP 1,234.56"
            ]
          }
        }
      ],
      "confidence": 0.97,
      "citations": [
        "TAX LINES"
      ]
    },
    "taxable_amount": {
      "value": {
        "amount": "1234.56",
        "currency": "GBP"
      },
      "confidence": 0.97,
      "citations": [
        "GBP 1,234.56"
      ]
    },
    "tax_due_or_withheld": {
      "value": {
        "amount": "1234.56",
        "currency": "GBP"
      },
      "confidence": 0.97,
      "citations": [
        "GBP 1,234.56"
      ]
    },
    "currency": {
      "value": "GBP",
      "confidence": 0.97,
      "citations": [
        "CURRENCY"
      ]
    }
  }
}

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Install

Install with a command

npx skills add https://github.com/iterationlayer/skills --skill extract-ct600-data

Paste it into your terminal and run it (requires Node.js). You can choose which agents to install it for, such as Claude Code or Codex.

Ask your agent

Please install the following Agent Skill.
https://github.com/iterationlayer/skills/tree/main/skills/extract-ct600-data

First review SKILL.md and the bundled files and confirm there is nothing suspicious (such as sending data externally or reading credentials). Then place it in ~/.claude/skills/extract-ct600-data/ for Claude Code, or ~/.agents/skills/extract-ct600-data/ for Codex.

Send this text to Claude Code or Codex as is. It checks the contents before installing.

View source on GitHub

Repository: iterationlayer/skills
Stars: 4
Forks: 0
Category: Data & AI
License: MIT
Original language: English
Last updated: Jun 9, 2026

A skill is a set of instructions and scripts for an agent. cccskills does not guarantee that skills are safe. Review the contents before you install.

Files included (1)

SKILL.md (original)

Extract CT600 Data

APIs Used

Prerequisites

Implementation

Response

Links

Reviews

Comments

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