You may pay your tax online with your credit card or with an electronic check (ACH debit). Online payments may include a service fee. Follow the instructions at tap.utah.gov.
You may also mail your check or money order payable to the "Utah State Tax Commission" with your return. Write your daytime phone number and "2019 TC-40" on your check. Do not staple your check to your return. Remove any check stub before sending. Do not mail cash with your return. The Tax Commission is not liable for cash lost in the mail. Include the TC-547 coupon with your payment.
Mail your payment, coupon and TC-40 return to the Utah State Tax Commission, 210 N 1950 W, Salt Lake City, UT 84134-0266.