Discover essential steps for safely paying international contractors. Our guide simplifies compliance, currency, payment methods, contracts, and more.Learn how to determine whether a person providing a service to you is an employee or an independent contractor. Refer to Arizona Withholding Tax Ruling (WTR) 16-4 to determine if a worker is an employee or an independent contractor for Arizona withholding tax purposes. If your contractor is self-employed (a sole proprietor in their country), you'll need them to fill out Form W-8BEN. An Independent Contractor Form must be filled out in blue ink (Click under "I" and select "Independent Contracting Form"). How to fill out Form 1099 for Independent Contractor? Accounts Payable reporting of foreign visitor payments is managed through Sprintax Calculus, a web-based, nonresident alien tax compliance software. Go back up to view the complete list of US states and territories. U. S. Citizen or U.S. Entity fill out Federal Tax Form W-9.