Journal Entry will affect accounts only, it won't show on your payroll reports. Also, there's no option to hide the details from your accountant. Once you added an accountant to your QuickBooks Desktop company file, you give the users unrestricted access to view all transactions, including payroll info.
You can follow these steps below to see the Areas and Activities your accountant can access:
Go to the Company menu.
Select Users and choose Set Up Users and Roles.
Click View permissions under the User and Role pop-up window.
Select Role and choose Accountant.
Then click Display.
You can also read these helpful articles for reference in your future tasks: