Illinois has released its 2017 Form W-2G and 1099 Electronic Filing Specifications.
Forms W-2G are mandated to be electronically filed for TY2017, and for TY2017 Forms 1099 will be electronically filed with the Illinois DOR on a voluntary basis. If a filer attempts to file Form W-2G information on magnetic media, it will not be accepted.
As a reminder, the due date for submitting 2017 Forms W-2G electronically is January 31, 2018.
To view the specifications, please click here.