Why won't TurboTax fill in a value for Form 1041 line 20, estate exemption?

I have filled out 1041 with TurboTax saying there are no errors (aside from missing SSN# for heirs), but form 1041 line 20, estate exemption is blank.  It should be $600 according to 1041 instructions and the sample filled out form in pub 559.  

Did this exemption get wiped out, but irs pubs haven't been updated?

I could manually put in $600 in forms view, but is there some reason Turbotax won't do that automatically?  I have boxes checked for decedent's estate, initial return and final return.