What entity pays you that retirement? I ask, because as an example, if it's military retirement and you have changed your resident state from AZ to IN, you only pay AX taxes on that income for the period of time you were an AZ resident. Then you pay IN taxes for the period of time you were an IN resident.
Also, if you are now an IN resident, see https://www.in.gov/dor/files/ib06.pdf to see if any part of it may apply to your retirement pay.
