You can add your ski pass by simply entering it in the input mask of your composite ticket. You will find the input mask in the section " Choose a ski resort".
Note: For some composite tickets there is currently no cross-regional input mask available. In this case you can enter your ski pass number in the input mask of the respective ski area in which you skied.
Please also note that the respective ski resort must be a partner of skiline.cc - see https://www.skiline.cc/resorts.