You mistakenly entered a zero in box 2a of TurboTax's Form 1099-R that has code 1, 2 or 7 in box 7 and the IRA/SEP/SIMPLE box marked. You must enter the Form 1099-R exactly as received. If the distribution is nontaxable, say, because you rolled over the distribution, you must still enter the same amount in box 2a as is in box 1 and properly answering TurboTax's follow-up questions will cause the distribution to be reported as nontaxable on Form 1040 line 4b.
