Services
The Services tab displays a list of Services linked to the invoice.

Available Actions
Services can be added to the list in two ways:
By selecting an existing service;
By creating a new service directly from the tab.
Both options are available via the button.
Conditions for Adding Services
The button is only active when the invoice is in Unpaid status.
When adding existing services, the following conditions must be met:
The service must have Draft status;
The service must not be already linked to another invoice.