How can I change a Staff Action Billable Service after it has been invoiced

When in the Staff Action - Billing Opportunity page, and clicking on a Bill, you can view the Selected Billable Service.

It may be thought that as long as the invoice has not been sent it can still be changed, but an invoice that has been created still exists in the system and is attached to the billing opportunity, whether it has been sent or not. Voiding that invoice will not change it and it will not allow you to change the Billable Service. Voiding an invoice is different than Deleting an invoice. If you Delete it, you can create another invoice. If you Void it – all you are doing is changing the invoice status but the invoice is still created and is connected to the billing opportunity.

When it comes to billing being provided by a third party (which may be the case when working with Staff Action Plans), Voiding or Deleting the invoice does not mean anything. What ultimately matters is what gets submitted to the billing system. So, any attempt to Void or Delete a submitted invoice is only going to cause a problem since the billing system is the “system of record” and what you do on the invoice side is meaningless. The only time Deleting an invoice makes sense is if the invoice is not yet submitted – or if the invoice was submitted but the related charges are also deleted from the billing system.