Utah State Tax Agency Contacts. You can contact the Utah State Tax Commission at 801-297-2200 or 800-662-4335. For more information on Utah state income taxes, you can visit the website of the Utah State Tax Commission. See other U.S. States, Territories, and Protectorates. of federal and state corporation and S corporation income tax returns. The Federal/State MeF E-File Program provides one-stop electronic ? ling of returns in a single transmission. Idaho accepts the federal approval of the S corporation election. Include Federal Form 2553 or a copy of the federal notice * Prior to finalization, many of the major Wisconsin income and franchise tax forms and instructions are available as advance drafts. Note: These advance draft items are not final and are subject to change at any time. Note: Utah's income tax has a single flat tax rate for all income. Note: We don't currently have Utah's income tax brackets for tax year 2018. Until updated 2018 tax rates become available for Utah, the tax brackets shown above and used in the income tax calculator will be from tax year 2016. Utah Utah State Tax Commission 210 North 1950 West • Salt Lake City, Utah 84134 • tax.utah.gov SS Corporation Corporation TTC-20S Forms & InstructionsC-20S Forms & Instructions * Prior to finalization, many of the major Wisconsin income and franchise tax forms and instructions are available as advance drafts. Note: These advance draft items are not final and are subject to change at any time. Form 1040 Department of the Treasury—Internal Revenue Service (99) U.S. Individual Income Tax Return . 2017. OMB No. 1545-0074. IRS Use Only—Do not write or staple in this space. For the year Jan. 1-Dec. 31, 2017, or other tax year beginning , 2017, ending , 20 See separate instructions. Your first name and initial . Last name We last updated Utah Income Tax Instructions in January 2019 from the Utah State Tax Commission. This form is for income earned in tax year 2018, with tax retu