Employees can make changes to tax withholdings within ADP by following these steps within ADP self serve portal:
1) Click myself.
2) Hover over pay and click Tax Witholdings.
3) Two boxes will appear that look like this. Click "Edit" in either box to make changes as desired.
Each form has worksheets that accompany the form employees can use as a guide to filling out of the forms. Please Note: We cannot advise on how to complete the forms from a legal standpoint.
Hope this helps! Let us know if you have additional questions/concerns.