How do I fix this: fed review says "Check This Entry. Form 8960 Worksheet: Your calculations could not be completed. Reference code: 0-786-942"? Continue is only choice.

If I click "continue," I receive the same message with code 2-871-273, and next with code 2-061-407. When I print my return, there is no Form 8960, and I believe my income is below the threshold for NIIT.  But I can't file my return electronically through TurboTax because of this error code.