> For the complete documentation index, see [llms.txt](https://docs.digitalriver.com/digital-river-api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.digitalriver.com/digital-river-api/developer-resources/digitalrivercheckout.js-reference/digitalrivercheckout-object/components/invoice-component.md).
# Invoice component
Gain a better understanding of the invoice component, how to create and mount it, as well as how to submit the information it collects from customers
The invoice component collects information needed to comply with Taiwan's e-invoicing requirements. For background on these requirements, refer to [e-Invoicing](/digital-river-api/using-our-services/e-invoicing.md).
To use the component, you'll need to [create it](#creating-the-invoice-component), [mount it](#mounting-the-invoice-component), and [submit its data](#submitting-the-invoice-component).
In the `data` returned by [`onChange`](/digital-river-api/developer-resources/digitalrivercheckout.js-reference/digitalrivercheckout-object/components/configuring-components.md#onchange), you can use [`showInvoiceAttribute`](/digital-river-api/developer-resources/digitalrivercheckout.js-reference/digitalrivercheckout-object/components/configuring-components.md#showinvoiceattribute) to determine whether this component must be displayed.
## Creating the invoice component
To create an instance of the invoice component, pass `'invoiceattribute'` to [`createComponent()`](/digital-river-api/developer-resources/digitalrivercheckout.js-reference/digitalrivercheckout-object/components.md#createcomponent-componenttype).
```javascript
let invoiceComponent;
...
invoiceComponent = components.createComponent('invoiceattribute');
```
## Mounting the invoice component
To attach the invoice component to your DOM, pass the `id` of its container to [`mount()`](/digital-river-api/developer-resources/digitalrivercheckout.js-reference/digitalrivercheckout-object/components.md#mount-elementid).
```javascript
...
invoiceComponent.mount('invoice-container');
```
## Submitting the invoice component
The invoice component exposes `done()`, which submits the customer's input and returns a boolean. It requires that you use the [`await`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/await) operator and, therefore, must be called inside an [async function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function).
```javascript
const invoiceComponentStatus = await invoiceComponent.done();
```
If `done()` returns `true`, this indicates that customers entered a properly formatted carrier value, and your code can advance them to the next stage of the checkout.
A `false` value indicates that customers either didn't provide a value or it's incorrectly formatted, and you shouldn't allow the checkout to advance. In this case, the component prompts customers to try again and offers them formatting assistance.
