Adjusted gross income tax exemption. Provides that, to the extent that the definition of the Internal Revenue Code (IRC) in Title 6 of the Indiana Code is not updated by amendment in the 2021 regular session of the general assembly or thereafter to conform with the CARES Act, a taxpayer is entitled to an exemption from state adjusted gross income equal to the amount of income associated with forgiveness of a covered loan under the Paycheck Protection Program of the CARES Act that is excluded from the taxpayer's federal gross income under Section 1106(i) of that Act, but otherwise included in the taxpayer's state adjusted gross income based on the definition of the IRC in Title 6 of the Indiana Code.