I'll help you disconnect your QuickBooks Online from TSheets, @jpbtbo1991.
To remove it from TSheets, you will need to sign in from there and change Install options to Uninstall QuickBooks.
Here's how:
Login to your TSheets account.
Go to the left side menu and locate Feature Add-ons.
In the Feature Add-ons drop-down, click Manage Add-ons at the bottom.
Then scroll to your Installedoptions and Uninstall the QuickBooks option.
This way, it will disconnect your TSheets and QuickBooks Online account.
You can also contact our TSheets Support team if you want a live agent to assist you with the process to disconnect QuickBooks Online from TSheets. You can reach them at your most available time every Monday to Friday from 6 AM to 6 PM PT.