iterationlayer Extract W-8BEN Data
Tax and finance teams use this recipe to extract W-8BEN 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": "w-8ben.pdf",
"url": "https://example.com/documents/w-8ben-sample.pdf"
}
],
"schema": {
"fields": [
{
"name": "beneficial_owner_name",
"type": "TEXT",
"description": "Beneficial owner name"
},
{
"name": "country_of_citizenship",
"type": "COUNTRY",
"description": "Country of citizenship"
},
{
"name": "permanent_residence_address",
"type": "ADDRESS",
"description": "Permanent residence address"
},
{
"name": "mailing_address",
"type": "ADDRESS",
"description": "Mailing address if different"
},
{
"name": "us_tin",
"type": "TEXT",
"description": "U.S. taxpayer identification number if provided"
},
{
"name": "foreign_tin",
"type": "TEXT",
"description": "Foreign tax identifying number"
},
{
"name": "reference_number",
"type": "TEXT",
"description": "Reference number if shown"
},
{
"name": "date_of_birth",
"type": "DATE",
"description": "Date of birth"
},
{
"name": "treaty_country",
"type": "COUNTRY",
"description": "Treaty country for Part II claim"
},
{
"name": "treaty_article",
"type": "TEXT",
"description": "Treaty article and paragraph"
},
{
"name": "withholding_rate",
"type": "TEXT",
"description": "Claimed withholding rate"
},
{
"name": "is_certification_signed",
"type": "BOOLEAN",
"description": "Whether certification is signed"
}
]
}
}'
import { IterationLayer } from "iterationlayer";
const client = new IterationLayer({ apiKey: "YOUR_API_KEY" });
const result = await client.extractDocument({
"files": [
{
"type": "url",
"name": "w-8ben.pdf",
"url": "https://example.com/documents/w-8ben-sample.pdf"
}
],
"schema": {
"fields": [
{
"name": "beneficial_owner_name",
"type": "TEXT",
"description": "Beneficial owner name"
},
{
"name": "country_of_citizenship",
"type": "COUNTRY",
"description": "Country of citizenship"
},
{
"name": "permanent_residence_address",
"type": "ADDRESS",
"description": "Permanent residence address"
},
{
"name": "mailing_address",
"type": "ADDRESS",
"description": "Mailing address if different"
},
{
"name": "us_tin",
"type": "TEXT",
"description": "U.S. taxpayer identification number if provided"
},
{
"name": "foreign_tin",
"type": "TEXT",
"description": "Foreign tax identifying number"
},
{
"name": "reference_number",
"type": "TEXT",
"description": "Reference number if shown"
},
{
"name": "date_of_birth",
"type": "DATE",
"description": "Date of birth"
},
{
"name": "treaty_country",
"type": "COUNTRY",
"description": "Treaty country for Part II claim"
},
{
"name": "treaty_article",
"type": "TEXT",
"description": "Treaty article and paragraph"
},
{
"name": "withholding_rate",
"type": "TEXT",
"description": "Claimed withholding rate"
},
{
"name": "is_certification_signed",
"type": "BOOLEAN",
"description": "Whether certification is signed"
}
]
}
});
from iterationlayer import IterationLayer
client = IterationLayer(api_key="YOUR_API_KEY")
result = client.extract_document(**{
"files": [
{
"type": "url",
"name": "w-8ben.pdf",
"url": "https://example.com/documents/w-8ben-sample.pdf"
}
],
"schema": {
"fields": [
{
"name": "beneficial_owner_name",
"type": "TEXT",
"description": "Beneficial owner name"
},
{
"name": "country_of_citizenship",
"type": "COUNTRY",
"description": "Country of citizenship"
},
{
"name": "permanent_residence_address",
"type": "ADDRESS",
"description": "Permanent residence address"
},
{
"name": "mailing_address",
"type": "ADDRESS",
"description": "Mailing address if different"
},
{
"name": "us_tin",
"type": "TEXT",
"description": "U.S. taxpayer identification number if provided"
},
{
"name": "foreign_tin",
"type": "TEXT",
"description": "Foreign tax identifying number"
},
{
"name": "reference_number",
"type": "TEXT",
"description": "Reference number if shown"
},
{
"name": "date_of_birth",
"type": "DATE",
"description": "Date of birth"
},
{
"name": "treaty_country",
"type": "COUNTRY",
"description": "Treaty country for Part II claim"
},
{
"name": "treaty_article",
"type": "TEXT",
"description": "Treaty article and paragraph"
},
{
"name": "withholding_rate",
"type": "TEXT",
"description": "Claimed withholding rate"
},
{
"name": "is_certification_signed",
"type": "BOOLEAN",
"description": "Whether certification is signed"
}
]
}
})
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: "w-8ben.pdf",
Url: "https://example.com/documents/w-8ben-sample.pdf",
},
},
Schema: il.ExtractionSchema{
Fields: []any{
il.TextFieldConfig{
Name: "beneficial_owner_name",
Type: "TEXT",
Description: "Beneficial owner name",
},
il.CountryFieldConfig{
Name: "country_of_citizenship",
Type: "COUNTRY",
Description: "Country of citizenship",
},
il.AddressFieldConfig{
Name: "permanent_residence_address",
Type: "ADDRESS",
Description: "Permanent residence address",
},
il.AddressFieldConfig{
Name: "mailing_address",
Type: "ADDRESS",
Description: "Mailing address if different",
},
il.TextFieldConfig{
Name: "us_tin",
Type: "TEXT",
Description: "U.S. taxpayer identification number if provided",
},
il.TextFieldConfig{
Name: "foreign_tin",
Type: "TEXT",
Description: "Foreign tax identifying number",
},
il.TextFieldConfig{
Name: "reference_number",
Type: "TEXT",
Description: "Reference number if shown",
},
il.DateFieldConfig{
Name: "date_of_birth",
Type: "DATE",
Description: "Date of birth",
},
il.CountryFieldConfig{
Name: "treaty_country",
Type: "COUNTRY",
Description: "Treaty country for Part II claim",
},
il.TextFieldConfig{
Name: "treaty_article",
Type: "TEXT",
Description: "Treaty article and paragraph",
},
il.TextFieldConfig{
Name: "withholding_rate",
Type: "TEXT",
Description: "Claimed withholding rate",
},
il.BooleanFieldConfig{
Name: "is_certification_signed",
Type: "BOOLEAN",
Description: "Whether certification is signed",
},
},
},
})
if err != nil {
panic(err)
}
_ = result
}
{
"name": "Extract W-8BEN Data",
"nodes": [
{
"parameters": {
"content": "## Extract W-8BEN Data\n\nTax and finance teams use this recipe to extract W-8BEN 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-w-8ben-data-overview",
"name": "Overview"
},
{
"parameters": {},
"type": "n8n-nodes-base.manualTrigger",
"typeVersion": 1,
"position": [
250,
300
],
"id": "extract-w-8ben-data-trigger",
"name": "Manual Trigger"
},
{
"parameters": {
"resource": "documentExtraction",
"schemaInputMode": "rawJson",
"schemaJson": "{\n \"fields\": [\n {\n \"name\": \"beneficial_owner_name\",\n \"type\": \"TEXT\",\n \"description\": \"Beneficial owner name\"\n },\n {\n \"name\": \"country_of_citizenship\",\n \"type\": \"COUNTRY\",\n \"description\": \"Country of citizenship\"\n },\n {\n \"name\": \"permanent_residence_address\",\n \"type\": \"ADDRESS\",\n \"description\": \"Permanent residence address\"\n },\n {\n \"name\": \"mailing_address\",\n \"type\": \"ADDRESS\",\n \"description\": \"Mailing address if different\"\n },\n {\n \"name\": \"us_tin\",\n \"type\": \"TEXT\",\n \"description\": \"U.S. taxpayer identification number if provided\"\n },\n {\n \"name\": \"foreign_tin\",\n \"type\": \"TEXT\",\n \"description\": \"Foreign tax identifying number\"\n },\n {\n \"name\": \"reference_number\",\n \"type\": \"TEXT\",\n \"description\": \"Reference number if shown\"\n },\n {\n \"name\": \"date_of_birth\",\n \"type\": \"DATE\",\n \"description\": \"Date of birth\"\n },\n {\n \"name\": \"treaty_country\",\n \"type\": \"COUNTRY\",\n \"description\": \"Treaty country for Part II claim\"\n },\n {\n \"name\": \"treaty_article\",\n \"type\": \"TEXT\",\n \"description\": \"Treaty article and paragraph\"\n },\n {\n \"name\": \"withholding_rate\",\n \"type\": \"TEXT\",\n \"description\": \"Claimed withholding rate\"\n },\n {\n \"name\": \"is_certification_signed\",\n \"type\": \"BOOLEAN\",\n \"description\": \"Whether certification is signed\"\n }\n ]\n}",
"files": {
"fileValues": [
{
"fileInputMode": "url",
"fileName": "w-8ben.pdf",
"fileUrl": "https://example.com/documents/w-8ben-sample.pdf"
}
]
}
},
"type": "n8n-nodes-iterationlayer.iterationLayer",
"typeVersion": 1,
"position": [
500,
300
],
"id": "extract-w-8ben-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 w-8ben data from the file at [file URL]. Use the extract_document tool with these fields:
- beneficial_owner_name (TEXT): Beneficial owner name
- country_of_citizenship (COUNTRY): Country of citizenship
- permanent_residence_address (ADDRESS): Permanent residence address
- mailing_address (ADDRESS): Mailing address if different
- us_tin (TEXT): U.S. taxpayer identification number if provided
- foreign_tin (TEXT): Foreign tax identifying number
- reference_number (TEXT): Reference number if shown
- date_of_birth (DATE): Date of birth
- treaty_country (COUNTRY): Treaty country for Part II claim
- treaty_article (TEXT): Treaty article and paragraph
- withholding_rate (TEXT): Claimed withholding rate
- is_certification_signed (BOOLEAN): Whether certification is signed
Response
{
"success": true,
"data": {
"beneficial_owner_name": {
"value": "Beneficial Owner Name",
"confidence": 0.97,
"citations": [
"BENEFICIAL OWNER NAME"
]
},
"country_of_citizenship": {
"value": "DE",
"confidence": 0.97,
"citations": [
"COUNTRY OF CITIZENSHIP"
]
},
"permanent_residence_address": {
"value": {
"street": "100 Market Street",
"city": "Berlin",
"postal_code": "10115",
"country": "DE"
},
"confidence": 0.97,
"citations": [
"PERMANENT RESIDENCE ADDRESS"
]
},
"mailing_address": {
"value": {
"street": "100 Market Street",
"city": "Berlin",
"postal_code": "10115",
"country": "DE"
},
"confidence": 0.97,
"citations": [
"MAILING ADDRESS"
]
},
"us_tin": {
"value": "Us Tin",
"confidence": 0.97,
"citations": [
"US TIN"
]
},
"foreign_tin": {
"value": "Foreign Tin",
"confidence": 0.97,
"citations": [
"FOREIGN TIN"
]
},
"reference_number": {
"value": "Reference Number",
"confidence": 0.97,
"citations": [
"REFERENCE NUMBER"
]
},
"date_of_birth": {
"value": "2026-04-15",
"confidence": 0.97,
"citations": [
"15 Apr 2026"
]
},
"treaty_country": {
"value": "DE",
"confidence": 0.97,
"citations": [
"TREATY COUNTRY"
]
},
"treaty_article": {
"value": "Treaty Article",
"confidence": 0.97,
"citations": [
"TREATY ARTICLE"
]
},
"withholding_rate": {
"value": "Withholding Rate",
"confidence": 0.97,
"citations": [
"WITHHOLDING RATE"
]
},
"is_certification_signed": {
"value": true,
"confidence": 0.97,
"citations": [
"IS CERTIFICATION SIGNED"
]
}
}
}