Arizona income tax withholding
Official state certificate
Form A-4
Published free by the Arizona Department of Revenue.
Every Arizona employee completes Form A-4 at hire, in addition to the federal IRS Form W-4 and Form I-9.
◆ get the Arizona employer packet — $2.95What the Arizona packet covers
- • Where to download the current Form A-4 free from the Arizona Department of Revenue.
- • Line-by-line completion guidance for employees and payroll staff.
- • Invalid or missing certificate handling and default withholding rules.
- • Retention schedule, reverification triggers and recordkeeping log.
- • Arizona registration steps, deposit schedule and filing deadlines.
- • New-hire reporting requirements and a self-audit checklist.
Related packets for Arizona employers
- State Income Tax Withholding PacketThe official state withholding certificate for any state with an income tax — California DE 4, New York IT-2104, Georgia G-4 and the rest — with completion guidance, registration steps and deposit deadlines.$2.95 one-time
- Form W-4 Federal Withholding PacketSets up federal income tax withholding correctly: how to complete the current IRS Form W-4, multiple-jobs and dependent worksheets explained, invalid-form handling and a payroll setup sheet.$2.95 one-time
- Form I-9 Employment Eligibility PacketEverything around the official USCIS Form I-9: line-by-line completion guide, acceptable-document matrix, Section 3 reverification log, retention calendar and a self-audit checklist.$2.95 one-time
- State Tax Registration & Nexus ChecklistRegister in the right states in the right order: income tax withholding accounts, unemployment insurance, sales tax nexus triggers and the filing cadence each one creates.$2.95 one-time
- Multi-State Payroll Tax GuideFor teams spread across states: which state's withholding applies, reciprocity agreements, nexus triggered by remote workers, registration order and the certificate each state requires.$2.95 one-time
- Payroll Tax Deposit & Filing CalendarA dated calendar of every federal and state payroll obligation: Form 941 quarterlies, Form 940 FUTA, deposit schedule rules, state unemployment and withholding returns.$2.95 one-time
Other states
Official government forms are published free by the issuing agencies. The Vault Doc does not reproduce or resell them — our packets provide employer-side guidance and are not legal or tax advice.