If you have already created an invoice previously, just click on the invoice to open it, then click the 'Create Receipt' button. Your receipt will be created automatically from the invoice. If you need to add any additional charges, just click on the 'Add Line Item' button to add them. After saving you can print, PDF or send the receipt to your guest.
If there is no invoice yet, go to the receipt template and fill out the receipt by adding your own and the customers information and line items. To add a line item, just click the 'Add Line Item' button.