When you use the Payment Adjustment function a closed ticket is Re-Opened.
FD: Map Screen > Ticket button on right side > Closed Tickets > Adjust Payments.
QSR: Sales Screen > Ticket button on Top left corner > Closed Tickets > Adjust Payment.
On new window Check on the DELETE box.
When prompted for confirmation, press YES. If you do not have permission to adjust payment, it will ask for the manager's access code.
Payment will be deleted, and you will be able to see an open ticket.
For more information, the link to this document is: How to adjust a payment