For creating Financial leasing is important to work with objects, which are financed.
At first, click on Objects situated at the top of the Dashboard.
Then the process of creating new object it's very simple! See for yourself in the video below.
https://www.youtube.com/watch?v=Wfe0ds0sI-o&list=PLGrwYyCxmp1RjVv_gk7TzUZpOnhoOUDot&index=15
Follow up:
How to do basic setup of OneCore Financial Leasing App