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09/16/2026 Release Notes: Iowa State Taxes – 2024 Form W-4

These release notes document improvements to the Checkwriters software released on 09/16/2026.

Iowa SITW – 2024 Form W-4 

To maintain compliance with Iowa State Tax requirements, we have enhanced the Iowa State Income Tax process. We have added the Employee submitted 2024 IA W-4 form or later checkbox to Iowa employees' Tax page. 

A screenshot of an Iowa SITW tax editing page, highlighting the "Employee submitted 2024 IA W-4 form or later" checkbox.

This enhancement accomplishes the following:

  • If an employee has an Iowa State Income Tax (IA SITW) record with a Start Date AFTER December 31, 2023, the Employee submitted 2024 IA W-4 form or later checkbox will be automatically checked and will be read-only (cannot be un-checked).
    • Any new employee will automatically have the Employee submitted 2024 IA W-4 form or later checkbox checked, configuring the employee in compliance.
  • If an employee has an Iowa State Income Tax (IA SITW) record with a Start Date ON or BEFORE December 31, 2023, the Employee submitted 2024 IA W-4 form or later checkbox will not be checked.
  • If an employee submits an Iowa State Income Tax (IA SITW) change request in ESS → My Payroll → Taxes, the Employee submitted 2024 IA W-4 form or later checkbox will automatically be checked and will be read-only (cannot be un-checked).