How do i make a credit invoice?

If you need to make a credit invoice that has already been registered in Regla as a normal invoice, you can simply choose the invoice from the Invoice list tab under Sales > File administration > Invoice. After you have found the original invoice select it by clicking on the icon in the first column of the invoice line, from there you should find an option to ‘Credit invoice’.

If you need to make a credit invoice from scratch you can simply register an invoice as you would normally do, when inserting the quantity of a product you should register it with a minus in front of the number.