for the calendar year preceding by two (2) years the calendar year in which property taxes are first due and payable.
For purposes of applying the annual cost of living increases described in subdivision (4)(A) and (4)(B), the annual percentage increase is applied to the adjusted amount of income from the immediately preceding year.
However, property tax liability imposed on any improvements to or expansion of the homestead property after the assessment date for which property tax liability described in subdivision (2) was imposed shall not be considered in determining the credit granted under this section in the current calendar year.
for an individual who has received a credit under this section in a previous year, increases in assessed value that occur after the later of December 31, 2019, or the first year that the individual has received the credit are not considered unless the increase in assessed value is attributable to substantial renovation or new improvements. Where there is an increase in assessed value for purposes of the credit under this section, the assessor shall provide a report to the county auditor describing the substantial renovation or new improvements, if any, that were made to the property prior to the increase in assessed value.
IC 6-1.1-20.6-8.5