To elect an Arizona withholding percentage, an employee must complete Arizona Form A-4, and submit it to their employer. Complete this form within the first five days of your employment to select an Arizona withholding percentage.You may use this form to request Arizona income tax withholding if you receive regularly scheduled payments from pensions or annuities that. Options including vehicle insurance. Heating, cooling and ventilation systems in any building or structure are to be maintained hazard-free, operational and in a state of good repair. A4 State Tax Withholding. Next, indicate your desired withholding percentage based on your tax situation. W4 Federal Tax Form Employee's Withholding Certificate. 1. Print or download the Arizona Form A-4.