You can get all details about your license in the Customer Portal.
📌Please note that you can not cancel your TeamViewer plan within the TeamViewer Management Customer Portal. Please send an email to our Service team by submitting a ticket via our support page. For cancelation details, please refer to our EULA.
More information is in this article:
Hello @SelH,
You can disable the autorenewal by submitting a ticket.
To submit a ticket to our customer support, please log in with your licensed TeamViewer account (the one your license is activated on) and click on Submit a ticket