If you are referring to the KY exemption for military retirement for military retirees who retired before 1 January 1998 or who have military service prior to 31 December 1997 then check your copy of your KY tax return and look for Schedule P (where the exemption amount would be figured) and Schedule M. The pension exclusion flows to line 8 on form 740. .
You will find the interview questions to determine your exemption amount in the KY state interview in the "Adjustments" section on the page titled "Government Pension".
If you need to amend to include a pension exclusion here is a helpful link.
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