Arizona residents who are working outside of Arizona may request their employer withhold Arizona income taxes from their wages for work done outside of Arizona. Independent contractors may be paid at intervals or at the end of the job.To elect an Arizona withholding percentage, an employee must complete Arizona Form A-4, and submit it to their employer. Please provide the requested information below as acknowledgment that you have received our Request for Proposal noted above. Who is require to withhold? • Withholding Agent. Work assistance issues and referral problems. Complainants have two years from the last act of alleged violation to submit a complaint.