I need to stop a salary employee's check this week, how do I do it?

I can help you achieve your goal today, phobbs-wgelitecl.

You can simply change the status of the employee who is on leave. This way, it won't show up when running payroll.

Let me show you the steps:
 

1. Go to the Payroll menu and select the Employees tab.
2. Select the employee's name. If the employee isn't on the list, select All employees from the Active Employees dropdown menu.
3. Select Edit next to Employment.
4. From the Status drop-down, select Unpaid Leave of Absence. 
   
5. Click Done.

You can also just skip payroll for this employee and leave the status active. Still, no paycheck record that will occur for this employee.

I'm adding this link for more details about the steps above: Change your employee's status on payroll.

Since you're working with payroll, you might want to check this article for some links about the payroll tasks in QuickBooks Online: QuickBooks Payroll help article hub

The Community is always open if you have other questions while working with payroll. I'll be around to help. Wishing you a great day ahead!