> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.zip.tax/v-6-0/api-reference/merchant-transactions-tax-cloud/merchant-refund-create/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.zip.tax/_mcp/server.

# Create Refund

POST https://api.zip-tax.com/merchant/refund/create
Content-Type: application/json

Available on Enterprise PlanForwards to TaxCloud POST /connections/\{connectionId}/orders/refunds/\{orderId}. orderId is a path identifier; an optional items\[] in the forwarded body scopes a partial refund (omit for a full refund). Requires a TaxCloud-connected merchant with credentials on file: this operation returns 403 for a self-managed merchant, whose only available transaction endpoint is /merchant/cart/calculate.

Reference: https://docs.zip.tax/api-reference/merchant-transactions-tax-cloud/merchant-refund-create

## Authentication

- `X-API-KEY` header (required) — API Key authentication via header

## Request

### Body (application/json)

This endpoint expects an object.

- `merchantId` (string, required) — UUID of the merchant. Must be owned by the calling account. Consumed by the Ziptax layer for routing and not forwarded to TaxCloud.
- `orderId` (string, required) — Your identifier for the order to refund, as supplied when the order was created. Consumed for routing and not forwarded in the refund payload.
- `batchId` (string, optional) — Batch ID for grouping related refunds.
- `items` (list of RefundItem, optional) — The line items and quantities to refund. Omit (or send an empty array) to refund the entire order.
- `returnedDate` (datetime, optional) — Include only if this return amends a previously filed sales tax return; providing it triggers an Amended Sales Tax Return. Not typically recommended.

## Response

### 200

TaxCloud response relayed verbatim.

- `connectionId` (string, required) — The TaxCloud connection the refund was recorded under.
- `batchId` (string, optional) — Batch ID grouping this refund with related refunds, if one was supplied.
- `createdDate` (datetime, optional) — RFC3339 datetime the refund was created.
- `items` (list of TaxCloudRefundItemResponse, optional) — The refunded line items, each with the refunded price, quantity, and tax amount.
- `returnedDate` (datetime, optional) — RFC3339 datetime the refund took effect.

## Errors

### 400 Merchant Refund Create Body Bad Request Error

Bad Request

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 401 Merchant Refund Create Body Unauthorized Error

Unauthorized

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 403 Merchant Refund Create Body Forbidden Error

Forbidden

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 404 Merchant Refund Create Body Not Found Error

Not Found

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 413 Merchant Refund Create Body Content Too Large Error

Request Entity Too Large

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 422 Merchant Refund Create Body Unprocessable Entity Error

Unprocessable Entity

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 429 Merchant Refund Create Body Too Many Requests Error

Too Many Requests

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 500 Merchant Refund Create Body Internal Server Error

Internal Server Error

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 502 Merchant Refund Create Body Bad Gateway Error

Bad Gateway

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

### 504 Merchant Refund Create Body Gateway Timeout Error

Gateway Timeout

- `detail` (string, optional) — A human-readable explanation specific to this occurrence of the problem.
- `errors` (list of ErrorDetail, optional) — List of individual error details
- `instance` (string, optional) — A URI reference that identifies the specific occurrence of the problem.
- `status` (long, optional) — HTTP status code
- `title` (string, optional) — A short, human-readable summary of the problem type. This value should not change between occurrences of the error.
- `type` (string, optional, default: about:blank) — A URI reference to human-readable documentation for the error.

## Types

### RefundItem

- `itemId` (string, required) — The itemId of the line item to refund. Must match an itemId from the original order.
- `quantity` (double, required) — The quantity of the item to refund. May be fractional and must not exceed the quantity on the original order.

### TaxCloudRefundItemResponse

- `index` (long, required) — Zero-based position of the item within the refund.
- `itemId` (string, required) — The itemId of the refunded line item, matching the original order.
- `price` (double, required) — The unit price refunded, calculated automatically from the order. When the order had discounts, this reflects the discounted amount actually paid.
- `quantity` (double, required) — The quantity refunded.
- `tax` (TaxCloudRefundTax, optional) — The tax amount refunded for this line item.
- `tic` (long, optional) — Taxability Information Code (TIC) of the refunded item.

### ErrorDetail

- `location` (string, optional) — Where the error occurred, e.g. 'body.items[3].tags' or 'path.thing-id'
- `message` (string, optional) — Error message text
- `value` (any, optional) — The value at the given location

### TaxCloudRefundTax

- `amount` (double, required) — The tax amount refunded for the item, calculated proportionally from the order's tax. When the order had discounts, this reflects tax on the discounted price.

## Examples

**Request**

```json
{
  "merchantId": "merchantId",
  "orderId": "my-order-1"
}
```

**Response**

```json
{
  "connectionId": "25eb9b97-5acb-492d-b720-c03e79cf715a",
  "batchId": "batchId",
  "createdDate": "2024-01-15T09:30:00Z",
  "items": [
    {
      "index": 1000000,
      "itemId": "itemId",
      "price": 1.1,
      "quantity": 1.1,
      "tax": {
        "amount": 1.1
      },
      "tic": 0
    }
  ],
  "returnedDate": "2024-01-15T09:30:00Z"
}
```

**SDK Code**

```python
import requests

url = "https://api.zip-tax.com/merchant/refund/create"

payload = {
    "merchantId": "merchantId",
    "orderId": "my-order-1"
}
headers = {
    "X-API-KEY": "<apiKey>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript
const url = 'https://api.zip-tax.com/merchant/refund/create';
const options = {
  method: 'POST',
  headers: {'X-API-KEY': '<apiKey>', 'Content-Type': 'application/json'},
  body: '{"merchantId":"merchantId","orderId":"my-order-1"}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.zip-tax.com/merchant/refund/create"

	payload := strings.NewReader("{\n  \"merchantId\": \"merchantId\",\n  \"orderId\": \"my-order-1\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("X-API-KEY", "<apiKey>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://api.zip-tax.com/merchant/refund/create")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["X-API-KEY"] = '<apiKey>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"merchantId\": \"merchantId\",\n  \"orderId\": \"my-order-1\"\n}"

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.zip-tax.com/merchant/refund/create")
  .header("X-API-KEY", "<apiKey>")
  .header("Content-Type", "application/json")
  .body("{\n  \"merchantId\": \"merchantId\",\n  \"orderId\": \"my-order-1\"\n}")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.zip-tax.com/merchant/refund/create', [
  'body' => '{
  "merchantId": "merchantId",
  "orderId": "my-order-1"
}',
  'headers' => [
    'Content-Type' => 'application/json',
    'X-API-KEY' => '<apiKey>',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://api.zip-tax.com/merchant/refund/create");
var request = new RestRequest(Method.POST);
request.AddHeader("X-API-KEY", "<apiKey>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"merchantId\": \"merchantId\",\n  \"orderId\": \"my-order-1\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "X-API-KEY": "<apiKey>",
  "Content-Type": "application/json"
]
let parameters = [
  "merchantId": "merchantId",
  "orderId": "my-order-1"
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.zip-tax.com/merchant/refund/create")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```