> ## Documentation Index
> Fetch the complete documentation index at: https://help.usetapp.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Add a Fast Charge and VAT

> Add an ad-hoc amount to the basket with a description and market-specific VAT rate.

Use Fast Charge for an ad-hoc amount that is not represented by a normal menu item. Always choose the correct VAT for what is being sold.

## Who can do this?

The order and fast-charge APIs authorize **Owners, Managers and Staff** for the shop.

## Where to do it

In the POS cart, select **Fast Charge** in the payment-action row.

## Add the charge

1. Enter the amount on the keypad. Digits are captured as cents/pence to avoid floating-point rounding.
2. Check the formatted amount. The web keypad caps input at an eight-digit minor-unit value to reduce extreme typos.
3. Open the VAT chip and select the correct rate returned for the shop market. Tapp initially prefers that market's standard code when available, but the operator remains responsible for the choice.
4. Add an optional description so History and receipts can identify the charge.
5. Select **Add charge to tab**. The action is disabled until the amount is above zero and a VAT rate is selected.
6. Review the new Fast Charge line in the basket before continuing to payment.

Use **Back to order** or Escape to leave without adding the charge.

The keypad appends digits to an integer minor-unit amount and backspace removes the last digit. The line is local until the basket is prepared and submitted. If prepare fails, inspect the cart before adding another charge. The API rejects variations on Fast Charge and validates the submitted VAT rate.

## Platform notes

Fast Charge becomes an order line without an offering-item ID; the API stores its description, price, quantity and VAT. It does not have normal menu variations or inventory tracking. Management mobile supports the same backend concept with its own UI.

## Market notes

VAT rates are loaded for the active shop's GB or German market. A preselected standard code is a convenience, not tax advice. Verify the correct treatment for the actual sale.

## Troubleshooting

If **Add charge to tab** is disabled, enter an amount above zero and select a VAT rate. If order preparation fails, inspect the basket before adding another Fast Charge so the same amount is not submitted twice.

## Related guides

* [Choose VAT for menu items](/en/menu/choose-vat-for-menu-items)
* [Take payment](/en/point-of-sale/take-payment)