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Directory Results for Illinois Department of Revenue IL-1310 Statement of Person Claiming Refund Due a Deceased Taxpayer For calendar year or other taxable year beginning / and ending / Step 1: Provide the claimant - tax illinois to Illinois Department of Revenue IL-2220 2003 Computation of Penalties for Businesses For IL-1120, IL-1120-ST, IL-1065, IL-1041, IL-1023-C, or IL-990-T filers Step 1: Complete the following ination 1 This form is for 2003 calendar year or