@cube1
If you try to report an inherited IRA with a basis, TurboTax is going to jumble that basis history into your own IRA's basis history.
This messes up the calculation of your own IRA's tax-free portion.
TurboTax can't produce an 8606 for you and an 8606 for you as a beneficiary.,
TurboTax just doesn't handle this situation.
