You can manage your Team-One Organization, including Billing, under the “Organization Settings” tab in the Global Settings. Note that you have to be an Organization Administrator in order to have this option.
To manage your subscription, go to the “Billing” tab. If you have been using Team-One as a trial, you will be prompted to create an active subscription.
Next, you can select the number of users who need access to Team-One as well as the billing plan you would like to chose (if applicable).