For Utah the state withholding ID is indeed 14 characters--11 digits followed by wth. Do not use any hyphens. AND the wth at the end must be in lower case. Example: 12345678901wth
Use lower case on all of your forms that have any Utah state withholding.
If there is withholding on a mineral payment, the ending should be wmp.
If you continue to have problems, try deleting the W-2 (or whatever form you are referring to), and completely re-entering the form.
