Is Disregarded Entity a choice?

Yes. 
however, when i select DE, i get red error when typing in ssn of individual whose grantor trust it is. How to fix?

i already used EIN of grantor trust for partner. 

I think you're doing it backwards, but I don't use ProSeries.

Look at the front of the K-1 to see how it is supposed to be shown.

Thanks. its correct. Support is not able to help either.

Once you fill in additional partners, the error will go away

didnt work. 

How do i show entity type as grantor trust. If i select DE, then disregarded entity is defaulted to the entity type. I cannot overwrite that field.