Go to the “Associations” menu and click on the “Create Association” tab.

Keep in mind that this feature unlocks when you reach club level 3.

When you create an Association you can set the name, the emblem, the country and the short description.

You can also choose the Association type. If it's an open one, any user can find it and join, while if it's closed other Managers will only be able to join it through invites or if their requests to join are approved.