Tax Release Notes 202604-1

The following tax updates have been made and are now available.

 

Millennium users can sync with MPAY for the changes. Please remember to restart your Process Servers after performing a SyncUP to MPAY.

 

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Please Note: The following items are under development and will be included in future tax releases:

 

E-File Updates:

 

  • Pennsylvania Collector Keystone LST Quarterly e-file

    • KEYSTONELSTEFILE is being enhanced to better support multiple work locations.

  • 2026 Michigan Unemployment Update

    • The agency released an updated file specification. As part of this update, the Out of State Wages field format has changed from zero-filled to blank.

 

Form Updates:

 

  • 2026 941(sp) Employer's Federal Tax Return in Spanish

 

Bulk Rate Updates:

 

  • Arizona SUI Bulk Rate Import

    • Import file is being updated to align with the latest agency specification.

  • Nebraska SUI Bulk Rate Import

    • Import file is being updated to align with the latest agency specification.

 

Tax Updates:

 

  • 2026 Kentucky Local Jenkins and Williamstown Occupational Tax Rate Update

  • 2026 Kentucky Local Remittance Address Updates

 

The current planned release schedule can be viewed on our website and is subject to change.

 

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The current release includes the following changes:

 

Development Tags

 

Form Updates:

 

  • 2026 Illinois Employer's Contribution and Wage Report

  • 2026 Kansas Quarterly Wage Report & Unemployment Tax Return

  • 2026 Employer's Return Of Louisiana Withholding Tax

  • 2026 Washington Quarterly Unemployment Insurance Tax Summary

 

E-file Updates:

 

  • 2025 944 Schema Update

 

System Updates:

 

  • CMS PBJ File Update

 

Tax Development Tags

 

Form: 2026 Illinois Employer's Contribution and Wage Report (M3-3151)

 

The Illinois Employer's Contribution and Wage Report, Form UI-3/40, for unemployment has been updated.

 

Please download 26ILUIL31A.pcl file from the SFTP site under "Tax Forms\Tax Forms for Tax Release 202604-1\" and place the file in your local M3 Tax Forms folder prior to generating the return.

 

Form: 2026 Kansas Quarterly Wage Report & Unemployment Tax Return (M3-3139)

 

The Kansas Quarterly Wage Report & Unemployment Tax Return, Form K-CNS 100, has been updated.

 

Please download 26KS1001A.pcl file from the SFTP site under "Tax Forms\Tax Forms for Tax Release 202604-1\" and place the file in your local M3 Tax Forms folder prior to generating the return.

 

Form: 2026 Employer's Return Of Louisiana Withholding Tax (M3-3140)

 

The 2026 Employer's Return of Louisiana Withholding Tax, Form L-1, has been updated.

 

Please download 26LAL1Q1.pcl file from the SFTP site under "Tax Forms\Tax Forms for Tax Release 202604-1\" and place the file in your local M3 Tax Forms folder prior to generating the return.

 

Form: 2026 Washington Quarterly Unemployment Insurance Tax Summary (M3-3152)

 

The Washington Quarterly Unemployment Insurance Tax Summary, Form 5208A, has been updated.

 

Please download 26WA208A1.pcl file from the SFTP site under "Tax Forms\Tax Forms for Tax Release 202604-1\" and place the file in your local M3 Tax Forms folder prior to generating the return.

 

E-File: 2025 944 Schema Update (M3-3096)

 

The annual 944 schema has been updated to v4.1.

 

System: CMS PBJ File Update (M3-3149)

 

The file available in Payentry NextGen has been updated to the latest version, 4.10.0.

 

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