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System-to-System Interface Option for States and Employers

e-IWO Software Interface Specification
June 6, 2018

Provides a processing overview and technical specifications for the electronic transmission of income withholding information

States Using e-IWO

January 14, 2021

States that have implemented e-IWO and those that are in development

e-IWO Record Layouts (New)

Version 4.0
March 20, 2024

Provides the universal record layouts for the e-IWO system

Describes the e-IWO, FCR, FOP, IRG and QUICK enhancements for implementation in April 2008

No-Programming Option for Employers

e-IWO Software Interface Specifications
July 3, 2012

Provides e-IWO specifications and an electronic version of the IWO for the employer no-programming option

e-IWO Release 10-02 Minor: Specifications

Implementation Date: December 3, 2010
September 3, 2010

Expands the FEIN Notification File to include an alternative employer address, organization known as name, and active/inactive indicator

e-IWO Release 13-02 Minor: Specifications

Implementation Date: October 4, 2013
July 5, 2013

Provides the record specification for the e-IWO application's new text that clarifies the SSA rejection code

Highlights child support collections, electronic processing, and employer new hire reporting

e-IWO Employer Agreement and Profile Form

OMB 0970-0370
September 7, 2022

Employers must complete the form to use the electronic Income Withholding Order process

Describes the e-IWO, Child Support Portal, e-NMSN, and FCE enhancements for implementation in Release 23-01