1099-R Retirement income is only taxable according to the laws in the state you live in when the $$ were sent out....not the state where it was accumulated or where it came "from".
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As such, "AR" back-filled into box 15 would be appropriate...and the state distribution amount (box 16) is usually the same as the value in box 2a, OR...if 2a is empty, or "Undetermined" it is the same as the Federally-taxable portion of the box 1 value.
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Usually, if a state exempts a portion of any retirement income, it is handled separately from the 1099-R itself, sometimes it is automatic, or sometimes it is dealt with during the State interview, where it gets chopped down from the initially-entered. state distribution amount . BUT...I don't have the AR software myself, so I don't know exactly how it ends up being dealt with the AR software.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
