To verify, are you getting issues with the activation code? If so, I would recommend contacting our Customer Care Team. They can review your account and help you with the subscription.
Here's how:
In your QuickBooks Online account, go to the Help > QB Assistant.
Type Talk to a human and select either Ask me a question or Contact Support Team.
Otherwise, let's do some basic troubleshooting steps to check if this is caused by your browser's cache. You can follow these steps:
Open a private browser or incognito, and log in to your QuickBooks Online account. This browser mode doesn't store cache.