If I understand correctly, your wife made a deductible traditional IRA contribution for 2015 (with the deduction appearing on 2015 Form 1040 line 32 or Form 1040A line 17), did a Roth conversion, then recharacterized the entire conversion (and these were your wife's only IRA transactions). If this is correct, there was no reason for your 2015 MFJ tax return to include a Form 8606 for your wife.
