I'm the trustee for my brother's new special needs trust (first time filing taxes with it around), which has its own TIN. Different materials online suggest a K-1 may or may not be necessary.
This TurboTax article suggests it may be necessary:
...some trusts and estates pass income through to the beneficiaries. In this case the beneficiaries receive a K-1 that shows the income that they need to report on their own tax returns.
While this one suggests he can enter directly:
If it's a living trust, you can use whichever TurboTax personal program suits your tax situation. There is no special tax form for living trusts; the trust's income and deductions are reported on your personal tax return.