Create one-time bill item

The key or identifier for the product or service billed (e.g., “key:rent”)

The content of the description that is going to be put on the bill

The amount charged for the one-time bill item

The quantity of items that is going to be put on the bill

The date in ISO 8601 format that one-time bill item is due

The accounting period for the one-time bill item, in the format “YYYY-MM-DD/YYYY-MM-DD”

The VAT details for the one-time bill item