Schedule K {form 1041)

Hello community!  My dad has a trust.  It has a bank account that made interest.  He received a K1 from the trust from these earnings. 

On Turbotax for his Schedule K-1 it asks: 

Box 1   -  Interest

Box 2a - Total Ordinary Dividends

Box 2b - Qualified Dividends

QUESTION:  Which box do I put his K-1 amount in?

Here is why I am confused.  The trust can make money in different ways I assume.  Just because the whole income of the trust was from a bank account intest, does that mean it goes under interest income on my dad's K-1?

Thank you