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# Add new extension

> Learn how to add a new extension to your Zuora tenant to link it with the Prepaid Drawdown app.

Learn how to add a new extension to your Zuora tenant to link it with the Prepaid Drawdown app.

An extension enables you to link your Zuora to the Prepaid Drawdown app. Take the following steps to add a new extension in your Zuora tenant:

In your Zuora tenant, navigate to **Settings** > **Platform** > **Manage My Extensions**.

Add `&showAddNew=true` to the current page's URL and refresh the page. For example, if you are using the API Sandbox environment, change the URL to:

```
https://apisandbox.zuora.com/apps/Extension.do?menu=Z-Platform&showAddNew=true
```

Similarly, if you are using the Production environment, change the URL to:

```
https://zuora.com/apps/Extension.do?menu=Z-Platform&showAddNew=true
```

Click **Add new extension**.

Complete the extension details in the **New Extension** page:

1. **Extension Type**: Select Charge Model from the drop-down list.
2. **Name**: Enter the name that will help you identify the extension. For example, Prepaid Drawdown.
3. (Optional) **Description**: Enter the description to help you identify the extension.
4. **Extension Profile**: Select Prepaid with drawdown from the drop-down list.
5. **Connect Token**: Enter the API Token from your Prepaid Drawdown app instance. You can copy the API-Token from the API tab of the app instance.
6. **Connect URL**: Enter the URL from your Prepaid Drawdown app instance. You can copy the URL from the API tab of the app instance.

Click **Save**. The extension is then saved and added to the **My Extensions** list.

Click **Activate** to activate this extension.