On Schedule 1 of the GA 500 (individual tax return)  there is an addition adjustment for "Federal Schedule A" that doesn't make sense to me.  It is an addition that the "help" section says might be a recalculation of the phase out using modified GA AGI. 

The client I'm working on isn't subject to any phase out and there's no form that shows how this calculation was arrived at.  I am trying to do a projection for next year and am recreating his return on ProSeries.

The client I'm looking at filed his return on different software and there is no recalculation on that return.

Has anyone had this issue?