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is first computed until it is used. This credit shall be applied first to the earliest year for which there is a liability. If there is a credit under this subsection from more than one tax year that is available to offset a liability, the earliest credit arising under this subsection shall be applied first. No carryforward credit may be claimed in any tax year ending on or after December 31, 2003. (k) Research and development credit. For tax years ending after July 1, 1990 and prior to December 31, 2003, and beginning again for tax years ending on or after December 31, 2004, and ending prior to January 1, 2032, a taxpayer shall be allowed a credit against the tax imposed by subsections (a) and (b) of this Section for increasing research activities in this State. The credit allowed against the tax imposed by subsections (a) and (b) shall be equal to 6 1/2% of the qualifying expenditures for increasing research activities in this State. For partners, shareholders of subchapter S corporations, and owners of limited liability companies, if the liability company is treated as a partnership for purposes of federal and State income taxation, for taxable years ending before December 31, 2023, there shall be allowed a credit under this subsection to be determined in accordance with the determination of income and distributive share of income under Sections 702 and 704 and subchapter S of the Internal Revenue Code. For taxable years ending on or after December 31, 2023, for partners and shareholders of Subchapter S corporations, SB3019 Enrolled LRB104 20255 HLH 33706 b Public Act 104-0468