"Allocation of long-term gain" section - what is: 28% rate gain?

hi - I'm working on a trust tax return using the "business" and trust version of turbotax.

 

In the section "Allocation of long-term gain", there is a box for 2019 "28% rate gain".

 

I don't know If that's a question or what exactly they are asking for in that box. I've already stated the long-term capital gain amount given to beneficiaries. Is TT asking if some portion of the long-term capital gain will be taxed at 28%? I don't see any help available (am I missing something).

 

Thank you!