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About IDOR
| Charitable Gaming, Income Tax, Sales & Excise Taxes | |
| Accounts receivable | Correspondence |
| Application forms | Error notices |
| Billings | Internal discrepancy reports |
| Blank forms (i.e., returns, claims) | Procedures |
| Bulletins to taxpayers | Production reports |
| Charts | Statistical reports |
| Completed forms (i.e., returns, claims) | Tax distribution reports |
| Legal | |
| Case files | Legislative historical files |
| Correspondence files | Management reports |
| Court case docket books and files | Municipal/County ordinance files |
| Department rules historical files | Subject files prior to Sunshine Act |
| Files containing names of non-for-profit organizations which have been rules taxable or exempt as purchasers | Statistical reports |
| Index letter rulings books | Wage garnishment files |
| Index of synopses of letter rulings issued by the Department's Legal Division | |
| Property Tax | |
| Abstracts of assessments and property tax billings and collections | Mailing list system (Township Clerks, County Board Chairmen, St. Clair County Board of Assessments, Cook County Assessor, State's Attorneys, County Recorders, County Board of Review Chairmen, County Sheriff's, Township Assessors, Township Supervisors, Railroads) |
| Annual overlap files for apportioning overlapping taxing districts | Pollution Control certification and forms |
| Appraisal Manual and Update | Property Tax Systems Book |
| Certification of capitol stock assessment records, publication of assessments, and any records pertaining to litigation available | Railroad returns and assessment and financial information |
| Charts, graphs, reports, statistics on all property tax data available | Records of private car line certification and publication of assessments and any record pertaining to litigation available |
| CIAO Master file status report | Reports to county treasurers of Personal Property Tax audit findings |
| Computer printouts showing tax rates, EAV, levies, and extensions for all taxing districts in the state | *Revenue Act of 1939 and Related Legislation |
| Farmland files, maps, abstracts, reviews and manuals | S/A Salaries |
| *Illinois Property Tax Manual ($5.00) | Sales ratio statistical reports |
| *Illinois Real Property Appraisal Manual ($ 50.00) | Study lists and material for potential and present assessment officials |
| *Illinois Tax Mapping Manual ($5.00) | Tax returns for all certified control facilities and railroads operating in Illinois |
| Letters to Supervisors of Assessments informing them of our audit findings of non-homestead exemption audit | Tentative and final multiplier files |
| Document Not Otherwise Classified | |
| Annual Report | Press Releases |
| Brochures | Research Reports |
| Informational Bulletins for various taxes | |