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rate imposed by subsections (a) and (b) of this Section. Any credit earned on or after December 31, 1986 under this subsection which is unused in the year the credit is computed because it exceeds the tax liability imposed by subsections (a) and (b) for that year (whether it exceeds the original liability or the liability as later amended) may be carried forward and applied to the tax liability imposed by subsections (a) and (b) of the 5 taxable years following the excess credit year, provided that no credit may be carried forward to any year ending on or after December 31, 2003. 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. If, during any taxable year ending on or after December 31, 1986, the tax imposed by subsections (c) and (d) of this Section for which a taxpayer has claimed a credit under this subsection (i) is reduced, the amount of credit for such tax shall also be reduced. Such reduction shall be determined by recomputing the credit to take into account the reduced tax imposed by subsections (c) and (d). If any portion of the reduced amount of credit has been carried to a different taxable year, an amended return shall be filed for such taxable year to reduce the amount of credit claimed. (j) Training expense credit. Beginning with tax years SB3019 Enrolled LRB104 20255 HLH 33706 b Public Act 104-0468