Why cannot edit form 8949 in TT 2018?

Why cannot I edit form 8949 in TT 2018 in forms mode as in prior years? I can only delete rows but cannot add or change rows.  What is the point of this? If I could delete rows, I should at least be able to add a row.  Some of the data provided to TT by the broker statement is incorrect (not reported to IRS).  I must be able to correct it as in TT for prior years.