Chapter 35 — REVENUE

(35 ILCS 5/251) Sec. 251. Pass-through of credits to partners and S corporation shareholders. For taxable years ending on or after December 31, 2023, if any person earning a credit against the tax imposed under subsections (a) and (b) of Section 201 is a partnership or Subchapter…

(35 ILCS 5/252) Sec. 252. Advancing Innovative Manufacturing for Illinois Tax Credit. (a) For tax years beginning on or after January 1, 2026, a taxpayer who has entered into an agreement under the Advancing Innovative Manufacturing for Illinois Tax Credit Act is entitled to a cr…

(35 ILCS 5/301) (from Ch. 120, par. 3-301) Sec. 301. General Rule. (a) Residents. All items of income or deduction which were taken into account in the computation of base income for the taxable year by a resident shall be allocated to this State. (b) Part-year residents. All ite…

(35 ILCS 5/302) (from Ch. 120, par. 3-302) Sec. 302. Compensation paid to nonresidents. (a) In general. All items of compensation paid in this State (as determined under Section 304(a)(2)(B)) to an individual who is a nonresident at the time of such payment and all items of deduc…

(35 ILCS 5/303) (from Ch. 120, par. 3-303) Sec. 303. (a) In general. Any item of capital gain or loss, and any item of income from rents or royalties from real or tangible personal property, interest, dividends, and patent or copyright royalties, and prizes awarded under the Illi…

(35 ILCS 5/304) (from Ch. 120, par. 3-304) (Text of Section from P.A. 104-6, Article 30, Section 30-5) Sec. 304. Business income of persons other than residents. (a) In general. The business income of a person other than a resident shall be allocated to this State if such person'…

(35 ILCS 5/305) (from Ch. 120, par. 3-305) Sec. 305. Allocation of Partnership Income by partnerships and partners other than residents. (a) Allocation of partnership business income by partners other than residents. The respective shares of partners other than residents in so mu…

(35 ILCS 5/306) (from Ch. 120, par. 3-306) Sec. 306. Allocation or apportionment of income by estates and trusts. The items of income and deduction taken into account by an estate or trust in computing its base income for a taxable year shall be allocated or apportioned to this S…

(35 ILCS 5/307) (from Ch. 120, par. 3-307) Sec. 307. Allocation of income by estate or trust beneficiaries other than residents. (a) Allocation of business income by beneficiaries other than residents. To the extent the business income of an estate or trust allocated or apportion…

(35 ILCS 5/308) (from Ch. 120, par. 3-308) Sec. 308. Allocation of Subchapter S Corporation Income by Subchapter S Corporations and Shareholders Other Than Residents. (a) Allocation of Subchapter S corporation business income by shareholders other than residents. The respective s…

(35 ILCS 5/401) (from Ch. 120, par. 4-401) Sec. 401. Taxable Year. (a) In general. For purposes of the tax imposed by this Act, the taxable year of a person shall be the same as the taxable year of such person for federal income tax purposes. The taxable year of any person requir…

(35 ILCS 5/402) (from Ch. 120, par. 4-402) Sec. 402. Methods of Accounting. (a) Same as federal. For purposes of the tax imposed by this Act, a person's method of accounting shall be the same as such person's method of accounting for federal income tax purposes. If no method of a…

(35 ILCS 5/403) (from Ch. 120, par. 4-403) Sec. 403. Effect of Determination for Federal Purposes. (a) Reporting. To the extent not inconsistent with the provisions of this Act or forms or regulations prescribed by the Department, each person making a return under this Act shall …

(35 ILCS 5/404) (from Ch. 120, par. 4-404) Sec. 404. Reallocation of Items. (a) If it appears to the Director that any agreement, understanding or arrangement exists between any persons which causes any person's base income allocable to this State to be improperly or inaccurately…

(35 ILCS 5/405) Sec. 405. Carryovers in certain acquisitions. (a) In the case of the acquisition of assets of a corporation by another corporation described in Section 381(a) of the Internal Revenue Code, the acquiring corporation shall succeed to and take into account, as of the…

(35 ILCS 5/501) (from Ch. 120, par. 5-501) Sec. 501. Notice or Regulations Requiring Records, Statements and Special Returns. (a) In general. Every person liable for any tax imposed by this Act shall keep such records, render such statements, make such returns and notices, and co…

(35 ILCS 5/502) (from Ch. 120, par. 5-502) Sec. 502. Returns and notices. (a) In general. A return with respect to the taxes imposed by this Act shall be made by every person for any taxable year: (1) for which such person is liable for a tax imposed by this Act, or (2) in the ca…

(35 ILCS 5/502.1) Sec. 502.1. Use tax. Beginning with taxable years ending on or after December 31, 2010, individual purchasers with an annual use tax liability that does not exceed $600 may, in lieu of the filing and payment requirements of Section 10 of the Use Tax Act, file an…

(35 ILCS 5/503) (from Ch. 120, par. 5-503) Sec. 503. Signing of returns and notices. (a) Signature presumed authentic. The fact that an individual's name is signed to a return or notice shall be prima facie evidence for all purposes that such document was actually signed by such …

(35 ILCS 5/504) (from Ch. 120, par. 5-504) Sec. 504. Verification. Each return or notice required to be filed under this Act shall contain or be verified by a written declaration that it is made under the penalties of perjury. A taxpayer's signing a fraudulent return under this A…

(35 ILCS 5/505) (from Ch. 120, par. 5-505) Sec. 505. Time and Place for Filing Returns. (a) In general. Returns required by this Act shall be filed at such place as the Department may by regulations prescribe. (1) Corporations. Except as provided in paragraph (3), corporate retur…

(35 ILCS 5/506) (from Ch. 120, par. 5-506) Sec. 506. Federal Returns. (a) In general. Any person required to make a return for a taxable year under this Act may, at any time that a deficiency could be assessed or a refund claimed under this Act in respect of any item reported or …

(35 ILCS 5/506.5) Sec. 506.5. Returns based on substitute W-2 forms. For a taxpayer who has received wages from an employer in Illinois, loses or was not provided a W-2 form, is unable to obtain a duplicate W-2 form from the employer, and subsequently obtains a substitute W-2 for…

(35 ILCS 5/507) (from Ch. 120, par. 5-507) Sec. 507. (Repealed). (Source: P.A. 92-84, eff. 7-1-02. Repealed internally, eff. 7-1-02.)

(35 ILCS 5/507A) (from Ch. 120, par. 5-507A) Sec. 507A. (Repealed). (Source: P.A. 92-84, eff. 7-1-02. Repealed internally, eff. 7-1-02.)

(35 ILCS 5/507AA) Sec. 507AA. (Repealed). (Source: P.A. 95-331, eff. 8-21-07. Repealed by P.A. 102-278, eff. 8-6-21.)

(35 ILCS 5/507AAA) Sec. 507AAA. The Childhood Cancer Research Fund checkoff. For taxable years ending on or after December 31, 2012, the Department shall print, on its standard individual income tax form, a provision indicating that, if the taxpayer wishes to contribute to the Ch…

(35 ILCS 5/507B) (from Ch. 120, par. 5-507B) Sec. 507B. (Repealed). (Source: P.A. 92-84, eff. 7-1-02. Repealed internally, eff. 7-1-02.)

(35 ILCS 5/507BB) Sec. 507BB. (Repealed). (Source: P.A. 95-331, eff. 8-21-07. Repealed by P.A. 102-278, eff. 8-6-21.)

(35 ILCS 5/507BBB) Sec. 507BBB. (Repealed). (Source: P.A. 97-1117, eff. 8-27-12. Repealed by P.A. 104-2, eff. 6-16-25.)

(35 ILCS 5/507C) (from Ch. 120, par. 5-507C) Sec. 507C. (Repealed). (Source: P.A. 92-84, eff. 7-1-02. Repealed internally, eff. 7-1-02.)

(35 ILCS 5/507CC) Sec. 507CC. (Repealed). (Source: P.A. 95-331, eff. 8-21-07. Repealed by P.A. 101-275, eff. 8-9-19.)

(35 ILCS 5/507CCC) Sec. 507CCC. (Repealed). (Source: P.A. 97-1117, eff. 8-27-12. Repealed by P.A. 104-2, eff. 6-16-25.)

(35 ILCS 5/507D) (from Ch. 120, par. 5-507D) Sec. 507D. (Repealed). (Source: P.A. 92-84, eff. 7-1-02. Repealed internally, eff. 7-1-02, and by P.A. 92-790, eff. 8-6-02.)

(35 ILCS 5/507DD) Sec. 507DD. The Illinois Veterans' Homes Fund checkoff. For taxable years ending on or after December 31, 2004, the Department shall print on its standard individual income tax form a provision indicating that if the taxpayer wishes to contribute to the Illinois…

(35 ILCS 5/507DDD) Sec. 507DDD. (Repealed). (Source: P.A. 102-278, eff. 8-6-21. Repealed by P.A. 104-2, eff. 6-16-25.)

(35 ILCS 5/507E) (from Ch. 120, par. 5-507E) Sec. 507E. (Repealed). (Source: P.A. 92-84, eff. 7-1-02. Repealed internally, eff. 7-1-02.)

(35 ILCS 5/507EE) Sec. 507EE. (Repealed). (Source: P.A. 95-331, eff. 8-21-07. Repealed by P.A. 99-933, eff. 1-27-17.)

(35 ILCS 5/507EEE) Sec. 507EEE. (Repealed). (Source: P.A. 99-423, eff. 8-20-15. Repealed internally, eff. 12-31-17.)

(35 ILCS 5/507F) (from Ch. 120, par. 5-507F) Sec. 507F. (Repealed). (Source: P.A. 92-84, eff. 7-1-02. Repealed internally, eff. 7-1-02.)

(35 ILCS 5/507FF) Sec. 507FF. Epilepsy Treatment and Education Grants-in-Aid Fund checkoff. The Department must print on its standard individual income tax form a provision indicating that if the taxpayer wishes to contribute to the Epilepsy Treatment and Education Grants-in-Aid …

(35 ILCS 5/507FFF) (Section scheduled to be repealed on January 1, 2027) Sec. 507FFF. Autism Care Fund checkoff. For taxable years ending on or after December 31, 2015, the Department must print on its standard individual income tax form a provision (i) indicating that if the tax…

(35 ILCS 5/507G) (from Ch. 120, par. 5-507G) Sec. 507G. (Repealed). (Source: P.A. 92-84, eff. 7-1-02. Repealed internally, eff. 7-1-02.)

(35 ILCS 5/507GG) Sec. 507GG. Diabetes Research Checkoff Fund checkoff. For taxable years ending on or after December 31, 2005, the Department must print on its standard individual income tax form a provision indicating that if the taxpayer wishes to contribute to the Diabetes Re…

(35 ILCS 5/507GGG) Sec. 507GGG. Thriving Youth checkoff. For taxable years ending on or after December 31, 2017, the Department must print on its standard individual income tax form a provision (i) indicating that if the taxpayer wishes to contribute to the Thriving Youth Income …

(35 ILCS 5/507H) (from Ch. 120, par. 5-507H) Sec. 507H. (Repealed). (Source: P.A. 92-84, eff. 7-1-02. Repealed internally, eff. 7-1-02.)

(35 ILCS 5/507HH) Sec. 507HH. (Repealed). (Source: P.A. 95-331, eff. 8-21-07. Repealed by P.A. 101-275, eff. 8-9-19.)

(35 ILCS 5/507HHH) Sec. 507HHH. Illinois Police Memorial checkoff. (a) For taxable years ending on or after December 31, 2017, the Department must print on its standard individual income tax form a provision (i) indicating that if the taxpayer wishes to contribute to the Criminal…

(35 ILCS 5/507I) (from Ch. 120, par. 5-507I) Sec. 507I. (Repealed). (Source: P.A. 92-84, eff. 7-1-02. Repealed internally, eff. 7-1-02.)

(35 ILCS 5/507II) Sec. 507II. (Repealed). (Source: P.A. 95-331, eff. 8-21-07. Repealed by P.A. 101-275, eff. 8-9-19.)