Also, I believe the figure on Line 1 of the 6198 should include an amount that was transferred in from a prior year return. Although I cannot test that, at the moment, I would not override that figure since doing so would, indeed, prevent e-filing the return.
Note that you can make entries in Forms Mode directly on the K-1 at-risk allocation worksheet as well as on Form 6198 itself (in most instances without having to resort to an override).
