You've come to the right place for help. I'll be happy to give you a hand with showing you the procedure for handling deductions in QBO.
First, you'll need to set up the deduction by following the steps below:
Select the Settings ⚙️ icon, then Payroll Settings.
Select Pay Schedules.
Select Deductions/Contributions.
Select Add a New Deduction/Contribution.
Select Health Insurance,Retirement Plans or Other Deductions from the Category drop-down ▼ menu.
The selection you make here determines the options that appear in the Type field. If you set up a Health Insurance or Retirement plan, you will need to enter the provider information. If you choose Other Deductions, you will be prompted to enter a description for the deduction or contribution. The description will print on the employee’s pay stub.
Once everything is filled out correctly, Select OK to save.
Note: You will enter the specific deduction and contribution amounts for each employee when you add employees in QuickBooks Online Payroll.