Assuming that this Form 1099-R has code G in box 7, the payer should have put a zero in box 2a instead of leaving box 2a blank. A blank box 2a implies that the payer does not know the correct taxable amount, which is untrue in this case since the taxable amount is known to b zero. (Some payers incorrectly think that a blank box 2a means the same as a zero in box 2a.) To get proper tax treatment in TurboTax, you'll likely need to enter a zero in box 2a of TurboTax's 1099-R form.
