You have done something wrong (or maybe it's TurboTax) or there is something you are not telling us. If Box 7 only contains a G (direct rollover from one qualified retirement plan to another) then the amount should not be taxable. it's like moving money from your left pocket to your right pocket. We can't see your return so it's not possible to diagnose your issue. As best as i can provide
the box 1 amount should appear box 4a (IRA) or 5a (other pension) but zero in the related 4b or 5b box and the word rollover should appear.
you may need to seek professional help and if needed file amended returns for the open years. the worst case scenario is you us it's taken again when withdrawn.
