Default on new project

Bonjour Axelor,

I have a qeastion. When I make a new project I would like to set the switch of imputable on default on. The imputable is form the axelor-human-resource.

Do I need to do something in the form? (project-form: com.axelor.apps.project.db.ProjectTask)
Now it is:

How do I make this on default (when making an new project) to set this to yes or 1?

Thanks, this will help me out.