> For the complete documentation index, see [llms.txt](https://chekin.gitbook.io/chekin-public-api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://chekin.gitbook.io/chekin-public-api/api-reference/einvoicing/invoicing-items.md).

# Invoicing Items

Invoicing items are the payment items of a reservation. They are grouped by category for invoicing: if there are two items with category `standard`, their amounts are summed and a single invoice line is created with the total.

{% hint style="info" %}
Skip this step if you want to send the sub-total amounts directly when [creating an invoice](/chekin-public-api/api-reference/einvoicing/invoices/issue-an-invoice.md).
{% endhint %}

### Suggested workflow

1. Create one item per charge of the reservation, always passing the `supplier_id`.
2. Use the `category` field to decide on which invoice the amount will be declared — the available categories depend on the provider.
3. Set `vat_rate` — it should match the supplier's default VAT resolved from `tax_category_key`.
4. Use `is_enabled: false` to exclude an item's amount from the invoice total without deleting it.
5. [Retrieve the sub-totals](/chekin-public-api/api-reference/einvoicing/invoices/retrieve-sub-totals.md) before issuing the invoice.

### Item Categories per Provider

| Category            | Description                                                              | Providers  |
| ------------------- | ------------------------------------------------------------------------ | ---------- |
| `standard`          | Accommodation costs and general services. Sums into `standard_sub_total` | All        |
| `fee`               | Tourist tax / climate resilience fee. Sums into `fee_sub_total`          | MyData, AT |
| `accommodation_tax` | City/accommodation tax. Sums into `accommodation_tax_sub_total`          | MyData     |