I believe this is incorrect. See following quote from irs.gov regarding use of 8959 when there is excess Medicare withholding:
29. My wages and self-employment income or my RRTA compensation do NOT exceed the threshold for my filing status, but my employer withheld 0.9 percent from my wages; do I need to file Form 8959?
Yes. If your employer withheld the 0.9% Additional Medicare Tax from your wages or compensation, and you will not meet the threshold based on your filing status, then the amount that was withheld from your wages or compensation may be refundable to you. Therefore, you need to file Form 8959, Additional Medicare Tax, to document the withholding and to receive a refund of any tax that was withheld in excess of the total tax owed on your individual income tax return.
The above seems to demonstrate that TurboTax is incorrect on this point and needs to be corrected.
