New Navigation:
With the new Paycor look, after logging into your profile, choose "Profile Summary" at the top of the page.
Next, click "Pay & Taxes" then "Taxes" when it drops down.
Choose whether you want to update your federal or state withholding. Then you can either click "Update Tax Forms" in the upper right or "Update Withholding" to adjust filing status.
Old Navigation:
To update your tax withholding in Paycor, go through the following steps (note the areas highlighted in yellow):