Select an invoice from the list and click the button on the Invoice Maintenance screen.
If the invoice can be deleted a popup will ask you if you really want to delete this invoice.
Click OK if you want to delete the invoice. The list of invoices
will be refreshed with the deleted invoice removed from the list.
Tips
You cannot delete an invoice if it has been issued but has not be marked as paid in full.
When you delete an invoice that has be issued and paid the time, travel, and expenditure associated with it
are not deleted. To delete these items the entire project must be deleted.