Yes, for cash refunds issued from the POS terminal itself — the amount is subtracted in the drawer's expected-cash formula (Starting Cash + Paid In/Out + cash sales − cash refunds), so a cash refund during an open shift lowers what you expect to count when that drawer is closed. This applies to refunds processed in the terminal (Transactions or Orders); a refund issued instead from Admin > Customer Orders (/admin/checkouts/{id}) isn't tied to a specific drawer and won't be reflected in this total.