Costs are added to the transaction through service requests or maintenance notes. For instructions on entering costs for a case, see Enter, edit, or delete case costs
Go from process menu Invoicing > Invoicing events
You can use search to search for transactions with different invoicing information.
When you see the invoices that are in the draft stage, you can discard these by clicking Reject
The invoice draft will then be transferred to the rejected invoices that can be found by searching for invoices that have been rejected.