To amend a return, use form TC-40 and the schedules and instructions from the tax year you are amending. The Utah County Assessor's office classifies property, sets taxable values, and supports tax rate and collection processes.SixFifty built our free Utah Name Change tool to simplify the name change process as much as possible. The Utah County Assessor's office classifies property, sets taxable values, and supports tax rate and collection processes. Subsection (1)(c)(iii). Allow up to 3-5 weeks for the Offender Registration Program to complete the form and return it to you. Or use form TC69C, Notice of Change for a Tax Account, available at tax.utah. Please be aware, two persons (witnesses) having knowledge of the facts must complete and sign the affidavit. 5) A Complete legal description for all property being conveyed must be included. Taxpayers wanting a refund of any income tax overpaid.