Penn does not have a specific institutional login or license for Trello’s premium features, but there is a free account tier available.
Be aware that if you hope to collaborate or share boards with other Penn affiliates, no matter their Center or School, their logins will only include the first part of their email address followed by '@upenn.edu.' These accounts are managed by ISC as part of a managed account agreement with Atlassian, and account access questions should be referred to ISC Client Care.