To elect an Arizona withholding percentage, an employee must complete Arizona Form A-4, and submit it to their employer. 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.To complete these forms you will need the date the current "Income Withholding Order" was signed. Select the Tax Withholding Form you want to download and update. The Arizona A-4 form can be downloaded, updated, and sent to District Payroll. Due dates for all types of property taxes are the same, October 1 for the first half and March 1 of the following year for the second half. Arizona employees must fill out Form A4 and select the percentage of tax they want withheld.