Prerequisites
POS and Back Office running.
Back Office
You can quickly locate previous orders by going to the Back Office:
Reporting > Sales Report > Order History
Now select the period/date (if date known):
Period > Custom Select the date FROM and the date TO Click Update This will list all the orders for that date.
Next enter the amount in the 'Payment Total' boxes, top and bottom (e.g. £17.29). Click Update. See the image below.