June 7, 2019 4:44 PM
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I might I have found a clue: part of the 2016 federal refund was applied to our 2017 federal taxes. It's entered on Line 65 of the 1040. The same figure is transferred somehow to Sch A, Line 5a as a state/local income tax paid. It shows up on Line 6 on the state/local tax deduction worksheet as an overpayment. I don't know how to remove it.