Arizona Income Tax Withholding Payment and Filing Requirements
Employers in Arizona must conform with these state rules relating to filing income tax withholding returns.
Periodic Returns. Quarterly (Form A1-WP and A1-QRT) by last day of month following end of quarter; monthly (Form A1-WP) by the 15th day of the following month; annually (Form A1-APR) due February 28.
Annual Reconciliation Returns. Form A-1R due February 28.