An employer must withhold Arizona income tax from employees whose compensation is for services performed within Arizona. To elect an Arizona withholding percentage, an employee must complete Arizona Form A-4, and submit it to their employer.Arizona employees must fill out Form A4 and select the percentage of tax they want withheld. Employers must register their EIN with ADOR using Form JT1, and employees must fill out Form A4 and select the tax withholding percentage. SmartAsset's Arizona paycheck calculator shows your hourly and salary income after federal, state and local taxes. Arizona Labor Laws FAQ. Making Online Payments Using the Arizona Tax and Wage System; Payments Definitions; Payments Instructions; Important Information about Additional Payments. The federal Fair Labor Standards Act (FLSA) establishes minimum wage, overtime pay, record keeping and child labor standards that apply to. Use ADP's Arizona Paycheck Calculator to estimate net or "take home" pay for either hourly or salaried employees. Overtime pay is set at the rate of 1.5 times of an hourly employee's rate if that employee works more than 40 hours in a week.