The tables in Publication 14, Withholding Tax Guide, list the current tax withholding rates. You can also view current and past income tax rates on this page.To claim credit for Utah withholding tax, complete TC-40W, page 1. The income tax withholding formula for the State of Utah has been updated to eliminate the withholding allowance for employees who have not filed a W4 form. The Utah State Tax form you would complete is the TC-40. Use this form to designate your withholding of federal and state of Utah income tax from your URS pension or annuity.