The Illinois Department of Revenue has adopted an amendment to a regulation on personal income tax withholding returns and payments that changes the filing deadline for employers that must file W-2 Forms electronically. Effective for calendar years after 2013, employers that are required to file W-2s on magnetic media for federal purposes must file copies of the W-2s with the department using the same magnetic media by February 15 of the year following the year of the withholding or, if applicable, by the extended due date of the federal information return. The deadline for calendar years before 2014 was March 31. (86 Ill. Adm. Code §100.7300, Illinois Department of Revenue, effective April 29, 2015.)
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