I seem to have worked around the problem. I entered a value for Gross income sourced at individual level, the matched the sum of the deductions in that column F, then ran the Smart Check which passed. Then I correctly set that value back to zero, ran the Smart Check again, and it still passed. Seems like a bug in the K-3 processing, which isn't that surprising since it's brand new and just came out in a TurboTax release three weeks ago.
