You can create a credit invoice for existing invoices within the ABOSS system.

To generate a credit for an existing invoice you'll first need to navigate to the invoice that needs to be credited. In the invoice sidebar (Attached to the top right of the invoice) you'll see the option to credit the current invoice.

ABOSS will generate a new invoice and duplicate all the information from the original invoice except the invoice number and invoice date. The amounts on the invoice will be inverted (e.g. € 1,000.00 will be € -1,000.00) automatically.
You can assign a new invoice number for the credit invoice and adjust the invoice date from here.

The credit invoice will have a reference to it's original invoice at the top of the invoice, clicking on the invoice number of the original invoice will navigate you to the original invoice.

The original invoice will also display a reference to the credit invoice, clicking on the invoice number of the credit invoice will navigate you to the credit invoice.

Working with custom calculations in your templates and the credit does not show a negative amount? Contact support and we'll help you out!