Remove an employee tax exemption

If your employee is no longer exempt from a tax, here's how you can turn on these taxes on:

Go to the Employees tab.
Select the Employee
On the Taxes & Exemptions section, click Edit
If this employee is no longer exempt from Federal and/or State income tax withholding, choose the appropriate Federal and/or State Filing Status (Single, Married, Married but withhold at higher single rate).
In the Exemptions section, click Edit.
Deselect the taxes the employee is no longer exempt from.
Click Save.
Click OK.