Schedule D Error

Turbo Tax Business is flagging an error on form 1120S line 23b that is a zero on my return.  This line is a summary of the tax on capital gains from Schedule D.  I have no capital gains and Schedule D is completely blank, but I can't get rid of this error.  If I delete Schedule D because it is not required, it keeps coming back and TT is reporting an flagging an error on form 1120S line 23b which is zero.

How do I get rid of this error?  It is preventing me from filing my return.