Hello there, @christie-poolsid.
I'm here to share details on how to add payroll items in QuickBooks Online Payroll.
We can open your employee profile from the Payroll menu. Then edit or add an item or amount or decide which pay types you want to add or change.
1. Go to Payroll, then click Employees.
2. Select your employee.
3. From Pay types, select Start or Edit.
4. Select the payment types your want to add or edit
5. Choose the Pay type ▼ for hourly, salary, or commission only. If your employee has multiple hourly rates, select Hourly 2 or Another hourly pay type. You can rename these hourly pay types.

6. Enter the rates for each pay type.
7. You can rename some of the payment types. Select Edit ✎ next to the payment type.
8. Select Save.
You can read the article about Run payroll reports. I've included tracking your payroll and employee expenses in QuickBooks.
Do you have any additional queries? Please feel free to leave any comments below. I'll be here to support you.