1. Remove an existing Item
2. Add discount by line
or by multiple edit
3. Change QTY
4. Change delivery charge or add service line
5. Change the price for a spare parts
6. Change tax rate – this is more for TOUS
all above trigger a refund, go further to confirm the tender
if need to refund to a specify tender then pick one of below
but if need to issue a credit note, then select below
after pick a tender and confirm and save to next step.