QuickBooks calculate payroll tax base on the following:
Number of dependents.
Other income and deductions.
Let's start by checking your employees' W-4 setup. Here's how:
Go to Workers, then Employees.
Select the employee in question, then Edit employee.
Click the pencil icon in the Pay section. Then, click the pencil icon for the W-4 section.
Verify the information for Federal filing status, Dependents, Other income, Deductions, and Extra withholding.
Once verified, you can delete and recreate the paycheck to correct your taxes. If you're using direct deposit, please contact our Payroll Support so they can assist you in creating a payroll adjustment. You can use this link to reach out: Contact the QuickBooks Online Customer Support team.