Once your trial period has go to an end you will be asked to upgrade to a Premium plan. You won't need to do this if your team is 4 members or less.
In order to upgrade your subscription go to your Profile Menu and select Account & Billing.
Then click in UPGRADE button and a pop up window will appear. Enter the number of licences you require for your team.
Straight after another popup window will appear for you to introduce your credit card details and then, you are DONE 🎉
Your monthly subscription is set up and running, you can now use Mindful Team fully. If you ever need to add or reduce more licenses you just need to follow the same process.