Forms mode won't allow edit

Form 1041 (Returns for Estates and Trusts).  Schedule B, Line 9 (required distributions) defaults to $9000.  For the estate I manage, it should be zero--the estate I mange has no required distributions.  Turbo Tax then adjusts the distributions to beneficiaries making them too high.   The interview mode does not have a link for Schedule B.  The forms mode shows the values, but will not allow an edit.   Additionally, TTx has changed the percent distribution among the beneficiaries.    I have used TTx for this estate in previous years and did not have this problem.  Please help.  Thanks.