I received 2019 trust income in 2020. The k-1 ends december 2019 but turbotax won't allow that. How do I report the income ?

It's due to the passing of the grantor. We only just finished dealing with the 2019 trust, and so that income was disbursed in 2020.  It doesn't belong in my 2019 return because that's not when I received it.