As a panelist (tester), you can request changes to your account by contacting Support.
We can help you change your email address, PayPal account, your location, your device types, etc. If you wish to reset your password please refer to this article.
At the moment, there is no 'dashboard' for panelists (testers), but it is something we are planning for in the future.
If you need account assistance, please let us know your email address that you signed up with as a panelist (tester), and what changes you'd like to make, and we will get it taken care of!