There are different ways to access Submitted Forms in the Management Portal:

Forms>Submitted Forms

Home > Forms > Submitted Form

To see forms connected to a client in the CRM > Management Portal > Contacts > Select client > Activity > Foms.

In the App, Forms> +Submitted Tab

Customer submitted tabs are avialble in the Management Portal and the App based on Group visiblity when creating the tab/s.

Submitted Form Tutorial