The table list how each state treats retirement payments in relation ot whether they are deductible income. It’s important to read any footnote.
According to this chart Indiana considers all pension payments received from a base period employer deductible. I also think it is a wise idea to verify with your state. Because although this chart does not prompt me to check whether any employee contribution to a plan may have an effect .. it’s just a good idea to verify .. if you know what I mean .. especially when it comes to “unions”.