You can reset your password from within the portal. From the Welcome back, <Your Name> area at the top right of the portal page, select Profile.
Note: the colours on your portal page will vary - it will depend on the branding of your accounting firm's portal.
From the profile page, in the Change your password area, type your old password, new password and confirm password, then press Change Password.
The Reset button will clear all the entries if you wish to start again.