You can access the Self Check Module module by adding /cgi-bin/koha/sco/sco-main.pl after your OPAC URL.
Once you have opened the self checkout page, depending on your value in the SelfCheckoutByLogin preference, you will be asked to enter you cardnumber or username and password.
Once you’re logged in to the self check module you will be asked to scan the items you are checking out. When you start to scan items they will appear below the barcode box.
When you are finished scanning items remember to click the ‘Finish’ button. This will prompt you to print a receipt (if you have chosen to enable the system preference SelfCheckReceiptPrompt) and log you out of the self check module.