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This article applies to:

  • Product: ONESOURCE Tax Information Reporting
  • State: Illinois

Illinois

State Annual Filings

Form
Filing Requirements
Corrections
1099-K
Direct filing required of all reportable 1099-Ks where the taxable state is Illinois where Box 1 > $1,000 and more than 4 transactions.
N/A
W-2G
Direct filing required of forms that have state withholding and taxable state is Illinois.
N/A
W-2
Direct filing required of all W-2s that have dollars to report where the taxable state is Illinois.
Corrections of directly filed forms are completed in the EFW2C format. Only corrected statements are required.
Filing Due Date
 Last day of January
Filing Method
 Electronic Upload
Filing Format
 SSA EFW2 for W-2 filings
CFS Participant
 No
Supporting Documentation
Additional Information
  • Per the specifications, W-2, W-2C and W-2G are required.
  • Illinois no longer includes Forms 1099-R and 1099-MISC in their electronic filing mandate. The forms are not required to be submitted to Illinois, unless the state requests them. Per Publication 110: "Payers who issue Forms 1099, which report Illinois income tax withheld, may
    voluntarily
     file these forms electronically through the Illinois FIRE Electronic Transmittal Program or through MyTax Illinois. If you do not electronically file Forms 1099, maintain these records for a period of three years from the due date or payment of the tax, whichever is later. Do not submit any paper returns, media storage devices (magnetic or optical) or email files
    unless we specifically request them
    . You must make them available to us if and when we request them."

State Periodic Filings

State Quarterly Reporting
Form
Filing Requirements
1099-B
1099-DIV
1099-G
1099-INT
1099-K
1099-LTC
1099-MISC
1099-NEC
1099-OID
1099-PATR
1099-R
1099-S
1099-SA
W-2
W-2G
Form must exist with Illinois as the taxable state and state withholding greater than $0.00.
Filing Due Date
 Last day of the month following the end of the quarter (April 30, July 30, October 30 and January 31)
Filing Method
 Electronic Upload
Electronic Filing URL
 https://mytax.illinois.gov/_/
Filing Format
 Illinois specified CSV format