To check your current subscription type and renewal date, Go to Goodnotes menu > View Account (Your name). Tap on the Subscription to view more details.
How do I renew my subscription?
Your subscription will renew automatically so long as you have a valid payment method connected to your App Store account. Read this article to check that your App Store account is properly set up for renewal.
How do I change/cancel my subscription?
To change or cancel your subscription, check out the below articles: