By clicking on the user icon, you will be able to see "Account Settings".

By clicking on account settings, it will redirect to account settings page

Clicking on the Preferences tab, you will see multiple check boxes relative to various fields. Check in the box related to the Additional Services field

During Move in, you will able to select the service plan you required

Click on lease menu and search by tenant name and then click on the lease row, this will redirect you to the centralized lease page

In the centralized lease page, you will able to see the service that you added