I'm here to assist you on how to cancel your account.
Before that, would you mind sharing what wasn't working on your payroll? QuickBooks Community is open 24/7 to help our customers with any concerns or questions they have with the products we offer. Nevertheless, here's how you can cancel your payroll subscription:
Go to the Gear icon in the upper-right corner.
Select the Billing & Subscription tab (you should sign in as either the Master Administrator or Company Administrator on the account).
In the Payroll section, select Cancel.
Choose Continue to cancel.
Complete the short survey and select Confirm cancel. Here's how it looks like:
Also, please take note that after canceling the service, you'll no longer be able to pay any outstanding tax deposits, print payroll reports, and file forms. You can check out this article to know more about this: Cancel Your QuickBooks Payroll Subscription.