@Leaminda - you really need to wait on the K-1; it is the Trustee's responsibility to create it and send it to the IRS and you. I wouldn't guess on what goes on it; it has to tie to the K-1 that the Trust generates.
For example, that RMD, were the taxes already withheld by the brokerage (which is typical) which would affect how the RMD, which is income, and the credit for the taxes paid would reflect on the K-1. Could be that the RMD doesn't belong on the K-1 and what you received net of the taxes already paid. Just a lot of mysteries created by guessing.
Better to spend the time and affort convincing your brother to complete his fiduciary responsibility and issue the K-1. It was due to you by March 30. Does he have an accountant doing it? that would make it easier.
