I am trying to run payroll but this is a second job for one employee. how do i figure out their taxes if they only want an additional amount taken each pay period

Let us guide you through some processes how to handle an additional amount to be withheld as taxes from an employee's secondary job paycheck, hdindustries24.

We can set up a different location in QuickBooks Online (QBO). Here's how:

1. Go to Payroll on the left side menu.
2. Choose Employees.
3. Select Employment details and click Edit.
4. In the Work Location field, tap the drop-down tab and choose Add work location. 
5. Enter all the details in and press Add location. 
6. Go back to the Work location field and select the new one.
7. Press Save. 

Also, we can assign an additional pay type to track the additional amount from their second job. Just follow the steps below:

1. Go to Payroll and select Employees.
2. Select your employee.
3. From Additional pay types, click Add. If you are adding for the first time, tap Start.
4. Choose a pay type category from the Pay type dropdown.
5. From the Name ▼ dropdown, select an existing pay type or enter the name of the brand new pay type you’d like to create and select + New pay type. This field may not be available for all pay types.
6. Select or enter the remaining details, as applicable.
7. Press Save.

On the other hand, employees can update their TD1 forms (Federal and Provincial Personal Tax Credits Returns) to reflect additional withholding amounts. If the employee hasn't provided you with updated TD1 forms, they can fill them out to formalize the request for extra tax deductions. Refer to this article about adding or changing the info in your employee profiles: Enter Form TD1 in QuickBooks Online Payroll.

You can refer to this article about running, printing, and customizing payroll reports: Run payroll reports.

If there's anything that we can help you with managing your employee's payroll or QuickBooks-related concerns, please let us know in the comments below.