SweetieJean, that link appears to be only for late filers and late payers, even those who filed extensions, not those that file and pay by the due date.
disgus1515, the link I provided is a penalty calculator, that the Utah tax agency requires you to use to calculate the form TC-40 line 41 penalty. Plug in any numbers and you will get zero penalty, if the dates you enter are before April 15.
