When to File and Pay. Easily and securely pay your tax online with your credit card, an electronic check (ACH debit), or other electronic options.Get Them Done Together. Don't miss the deadline. Utah offers a 6-month extension, which moves the individual filing deadline from April 15 to October 15 (for calendar year filers). File your Utah income tax return. All tax brackets are supported. With either option, payments start in January of the year taxes are due in November.