K-1 Box 21 Foreign Tax not carried to Schedule A

The Schedule A Tax and Interest Deduction Worksheet line 4c Foreign taxes does not get filled in from box 21 data on K-1.  The Data Source for the line mentions K-1 line 16 which is from prior years.  If I Override line 4c I get the right tax but Check warns about the override when doing electronic filing and I don't want the electronic filing to be rejected.  What should I do?