How to File and Pay. Complete Form W-4 so that your employer can withhold the correct federal income tax from your pay.Give Form W-4 to your employer. Phone Number (385) 468-7200 ; Mailing Address 2001 South State Street , Ste N3-300. If you use a tax preparer to fill out Form 941, make sure the preparer shows your business name exactly as it appeared when you applied for your EIN. Transaction Privilege Tax (TPT): A tax on a vendor for the privilege of doing business in the state. To file online, use TAP to file your Utah withholding tax return, Form TC-941. Select the Withholding Billing Notice option if you have received a Withholding Tax notice and need to pay a balance due. Utah requires corporations to file an annual report before the anniversary date of the incorporation. How do I fill out the SALT Report?