Is there a way to change the federal withholding amount for an employee that does not require changing it every time we run payroll?

Good day, @randa-oneplanets.

QuickBooks Online Payroll calculates the federal withholding based on the pay period, filing status, gross pay, and the number of allowances that were set up in the program. 

If you wish to update your employee's withholding taxes, you can follow these steps. Just make sure to copy the old setup in your previous system so that QuickBooks would calculate the same amount. Here's how:

1. Go to the Payroll menu and select Employees.
2. Click the employee's name.
3. Select Edit ✎ on the section you want to update.
4. Edit their info and click Done.

Additionally, we have a list of articles to help you set up additional payroll services.
 

• Enroll to electronically pay and file taxes
• AP Intego pay-as-you-go workers' compensation overview for IOP and QBOP
• Time Tracking (TT) setup flow

I'm just a reply away if you have other questions with the QuickBooks Online Payroll. Just add the details of your concerns in this thread and I'll help you out.