Illinois Releases Electronic Transmission Guide for 2021 Forms W-2G and 1099 Filed in 2022

Paul Ogawa
December 6, 2021


Illinois recently released an updated transmission guide for 2021 Forms W-2G and 1099s Filed in 2022. Most changes to the transmission guide are the result of consolidating information from other sources, clarifying information from the previous guide, or updating dates to reflect the new tax year.

General Information. Illinois begins accepting 2021 W-2G and 1099 transmissions on January 3, 2022. The deadline is March 31, 2022. Illinois accepts W-2Gs and 1099s (except for 1099-Ks) filed through MyTax or the Gateway method. Users must register to file at least one business day before transmitting a file.

Table of Contents. The new guide includes an interactive table of contents.

*1099s & 1099-K. * If the IRS requires a filer to submit 1099-Ks electronically, Illinois will only accept the 1099-Ks through the Gateway method, NOT Mytax. The filing requirements for 1099-K have not changed since 2020.
1099-K must be submitted electronically to Illinois if issued to a payee with an Illinois address and 1) 4+ separate transactions exceed $1,000; or 2) IRS requires the 1099-Ks to be electronically filed. All other 1099s are not included in the electronic filing mandate OR not required to be submitted to Illinois unless requested.

Added Content. The new guidance includes an additional eight pages of content. The new content incorporates information from a separate guide: Form W-2G and 1099 FIRE Specifications and Record Layouts. References to this guide have been removed. The newly incorporated tables include: ILFIRE Header Record Layout, ILFIRE Federal State Code Position by Form Type, ILFIRE Fed/State Code, and ILFIRE Error Codes. Other new content on pages 7-11 includes photos/written guidance on navigating the HttpsPost Utility Program.

Acknowledgements. The new guidance elaborates on the importance of acknowledgements. An accepted “acknowledgement” is proof of filing. Between thirty minutes and sixty days after filing electronically with the Gateway Method, users must reenter the system to retrieve the acknowledgement. The acknowledgement indicates whether the transmission has been accepted or rejected. Illinois will NOT send acknowledgements to users. If a file is rejected, the user must resubmit the ENTIRE file. If a multi-employer file is rejected, all employers are rejected, and the entire file must be resubmitted.

New Emails. The new guidance includes email addresses for questions concerning MyTax Illinois ( and ILFIRE Transmission Program (

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Paul Ogawa

Paul Ogawa is a Senior Regulatory Counsel at Sovos Compliance. As part of the Regulatory Analysis team, his main areas of focus are state and federal tax withholding, the Affordable Care Act (ACA), and Canadian tax information reporting. Prior to Sovos, Paul worked as a litigation attorney in Boston area law firms, representing clients in insurance subrogation claims, family law matters, and employment disputes. Paul is a member of the Massachusetts Bar, earned his B.A. from Brandeis University and his J.D. from the Suffolk University Law School.
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