The 7-digit Employer Account Number (EAN) is the simplest way for UIA staff or third-party administrators (TPAs) to find an employer account in MiUI using search functions. The 7-digit EAN is also used to initiate a MiUI account. If an employer account changes status (reimbursing, contributing, terminated, reactivated), it keeps the same EAN—so employers will no longer use multiple EANs as they have in the past.
WOTC actions now take place in MiUI for Tax.
As part of the transition to MiUI, the UIA will attempt to convert all Employer–TPA relationships that previously existed in MiWAM into MiUI, including relationships for WOTC TPAs. The exception is when an employer had two or more TPAs assigned in MiWAM. In that case, the employer is not added to the TPA’s record automatically and must grant permission to that TPA in MiUI. To complete this action, the employer will need the TPA’s new MiUI TPA ID.
TPAs with the proper authorization can also associate themselves with an employer outside of the Automatic Assignment process.
TPAs who had permission to conduct WOTC actions in MiWAM are granted the WOTC Update and Submit role in MiUI. MiUI also includes a WOTC View Only role that can be assigned to TPAs.
A Reporting Unit refers to a secondary location for a company, a different physical location, or a subsidiary. In MiUI, Reporting Unit details are stored elsewhere, so the 7-digit EAN does not include the 3-digit location code.
The Employer Account Number is the system ID for each employer account in MiWAM and MiUI, but its format and what it represents differ between the systems.
SIDES will be available in MiUI when Benefits functionality is released summer 2026. Until then, please continue processing any SIDES related work in MiWAM.
MiUI will have new file formats: Delimited, ICESA, EFW2, and XML. To learn more about these file formats please reference the Quarterly Wage Reports (QRG) on MiUI University.
Please note, the MiWAM file format will no longer be accepted, employers and/or Third-Party Administrators (TPAs) will need to update existing processes to reflect acceptable file formats.
