Your amended tax returns will not show any claiming of Roth IRA contributions (nor do the need to), each amendment will just show the removal of a previously reported deduction for a traditional IRA contribution or will change Form 8606 to show that no nondeductible traditional IRA contribution was made.
If your Form 8606 needs to be corrected to eliminate a previously reported nondeductible traditional IRA contribution, you'll need to prepare the corrected Form manually to show $0 on line 1 (and probably line 2a for at least some of them). Doing the amendment in TurboTax will just remove the Form 8606 since it will see that your original tax return would not have included it, but now you need to explicitly correct the Form 8606.
