ILLINOIS Tax Forms and Instructions
Below are the relevant links for IL State Tax information.
Illinois State Mandate Once accepted in the IRS E-file Program, participants are approved for Illinois E-file. There is no separate application process for Illinois.



ILLINOIS Tax Forms and Instructions Information
Online Credit Card Payments
  • Offical Payments
    Or call 1-800-2PAY-TAX (Offical payments charges a nominal fee for this service)(Use Jurisdiction Code 2000 for Individual and Jurisdiction Code 2006 for Business Taxes)
Mailing Addresses
  • Return Mailing Address:
    ILLINOIS DEPARTMENT OF REVENUE
    PO Box 1040
    Galesburg IL 61402-1040

  • Return Mailing Address without Refund:
    ILLINOIS DEPARTMENT OF REVENUE

    SPRINGFIELD IL 62726-0001

  • Estimates Mailing Address:
    Illinois Department of Revenue

    Springfield, IL 62736 0001

  • Amended Return Mailing Address:
    Illinois Department of Revenue
    P.O. Box 19007
    Springfield, IL 62794-9007

  • Extension Mailing Address:


    Illinois Department of Revenue
    P.O. Box 19005
    Springfield IL 62794-9005

  • Electronic Filing:
    Each electronic IL-1040 return requires a Form IL-8453, Illinois Income Tax Electronic Filing Declaration, as the non-electronic portion of the accepted return. This declaration must be signed and given to the taxpayer along with their IL-1040 copy and any associated supporting documents, out-of-state returns, and Form IL-1310, Statement of Person Claiming Refund Due a Deceased Taxpayer (if filing an IL-1040 return on behalf of a deceased taxpayer)].
Federal Tax Information