Welcome to the QuickBooks Community. Although it will be sad to see you go, here's how you can cancel your QuickBooks Time subscription.
Go to Company Settings and select Account & Billing.
Choose Cancel Subscription.
Once this is completed, you will receive an email confirmation displaying that the cancelation is completed. If you would like to know what happens to your account information once it is close, please review this article.
If you need any help with this process, please let me know. I will do my best to assist you further. Take care!