Only Account Owners have access to view the Plan & Billing. They can easily add their billing information, upgrade and downgrade their subscription.
For Start and Grow license plans, we offer 30 days of trial. We don't require your credit card details unless you decide to continue using your Kadanza installation. However, if you like Kadanza and would like to continue, please make sure to enter your billing details before your account gets suspended.
You can always contact us if you have some questions about your installation and our subscription models.