Yes, there is a penalty for filing state taxes late in Utah. The Utah State Tax Commission typically imposes a late filing penalty when a taxpayer does not submit their tax return by the due date, which is usually April 15 for individual income tax returns. The penalty can begin as a percentage of the total amount owed, and it tends to increase the longer the return remains unfiled. In addition to the late filing penalty, interest may also accrue on the unpaid tax balance from the due date until the tax is paid in full. However, if a taxpayer has filed for an extension, they may avoid the late filing penalty, provided they submit their return by the extended deadline. It is advisable to check the current web page of the Utah State Tax Commission for the most accurate and up-to-date information regarding penalties and filing requirements.