35 ILCS 5/241
Taxpayers who have been awarded a credit under the Music and Musicians Tax Credits and Jobs Act are entitled to a credit against the taxes imposed by subsections (a) and (b) of Section 201 of this Act in an amount determined by the Department of Commerce and Economic Opportunity under that Act. The credit shall be claimed in the taxable year in which the tax credit award certificate is issued, and the certificate shall be attached to the return. If the taxpayer is a partnership or Subchapter S corporation, the credit shall be allowed to the partners or shareholders in accordance with the provisions of Section 251.
The credit may not reduce the taxpayer's liability to less than zero. If the amount of the credit exceeds the tax liability for the year, the excess may be carried forward and applied to the tax liability of the 5 taxable years following the excess credit year. The credit shall be applied to the earliest year for which there is a tax liability. If there are credits from more than one tax year that are available to offset a liability, the earlier credit shall be applied first.
35 ILCS 5/241