Crediting invoice line
Open the reservation for which you want to adjust the invoice. Select New invoice. A draft credit invoice and a draft invoice will be made. All invoice lines of the original invoice are automatically credited on the draft credit invoice. On the new draft invoice, the invoice lines of the credited invoice will be copied. This invoice can be adjusted.
1. Click View invoice to open the draft invoice;
2. Click Credit invoice rule. Choose the invoice line you wish to credit and select Credit;
3. The invoice line will be added as 'credit' to the invoice.