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List of business rules and recommended actions for electronically accepting Income Withholding Orders

Detailed Overview of the e-NMSN Process

Another Paperless Solution
March 9, 2022

Provides an overview of the e-NMSN process and options available to states and employers

Summarizes the new requirement that employers must report the date that an employee first performs services for pay to the SDNH

How to Complete an Income Withholding for Support Order

A Guide to the IWO and Instructions
January 19, 2021

Training presentation provides directions on how to complete the Income Withholding for Support Order (IWO)

e-NMSN Software Interface Specification (Updated)

Version 1.6
January 31, 2022

Provides software interface specification of an electronic version of the National Medical Support Notice for the employer

For state agency staff, this explains some differences between independent contractors and employees

Guidance on what can and cannot be changed on the standard OMB-approved IWO form

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

e-IWO Record Layouts

Version 4.0
March 20, 2024

Provides the universal record layouts for the e-IWO system