Synopsis As Introduced Amends the Illinois Income Tax Act. Creates a deduction for the full amount of union dues paid by the taxpayer during the taxable year if the taxpayer was not allowed a federal deduction under the Internal Revenue Code. Provides that, if any amount of union dues representing federal miscellaneous itemized deductions was allowed as a federal deduction, then the amount allowed as an Illinois deduction shall be a percentage of the union dues disallowed under the Internal Revenue Code. Provides that the deduction is exempt from the Act's automatic sunset provision. Effective immediately.