Click the Gear icon and then Account and settings.
Tap the Billing & Subscription tab.
This way, we'll be able to view if your account is active. In case you've encountered an error in subscribing, check this article: Unable to subscribe to QuickBooks Online.
Additionally, you can always view your payment history. This way, you can track and manage your subscription.
Lastly, check out these articles below on how to update the card on file, change your subscription, and other related topics.