Information to help pass-through entities and pass-through entity taxpayers understand and comply with Utah's pass-through entity withholding requirements. Our IR335 Employer's guide explains your obligations if you need to withhold tax from a payment made to a nonresident contractor.GLACIER helps determine tax residency, withholding rates and income tax treaty eligibility. GLACIER also manages NRA's paperwork, maintains NRA's data and. This publication will help you determine your status and give you information you will need to file your US tax return. The IRS uses Form W-8BEN to track the income that non-US citizens and foreign businesses generate while contracting with American companies.