To cancel your Tabnine pro Subscription, sign in on Tabnine App and go to Plan & Subscription
Click Manage Subscription > Cancel Subscription
Since Tabnine bills in advance, the cancellation will be set at the end of your billing cycle once the invoice is already generated. In case you did not intend to subscribe or renew your subscription, please contact support at support@tabnine.com and we will assist you with the cancelation.