You may be exempt from Utah withholding requirements if you do business in Utah for 60 days or less in a calendar year and have Tax Commission approval. Utah withholding tax tables for quick lookup.For questions about Utah withholding tax, see , or call us at 801-297-2200 (1-800-662-4335 outside the Salt Lake. The Form W8BEN, Certificate of Foreign Status of Beneficial Owner for United States Tax Withholding PDF is a legitimate US tax exemption document. We provide a broad range of services and information through our website. 26 U.S. Code 7205 makes it a federal offense to intentionally provide false information on your withholding certificates or fail to supply the information. The IRS Tax Withholding Estimator is available to help employees determine the proper amount of federal income tax withholding. Step 1 - Online Property Tax Payments. Salt Lake County hopes that you find paying your property taxes online a quick and simple process. Payments made to foreign vendors will be subject to US federal income tax withholding of 30 percent unless: