This depends on what kind of trust is the owner of the LLC.
A single member LLC is (unless it has elected to be treated as a corporation or an S-corporation) always a disregarded entity. This means the income and expenses are included with the owner’s return as if the LLC did not exist.
If the trust is a living (or a grantor) trust, the entity is disregarded for income tax purposes from the individual owner. In this scenario, the income and expenses will be reported on Schedule E of the Form 1040 of the grantor (as if the grantor owned the rental in their own name).
If the trust is a domestic trust (a non-grantor trust) or income of the estate of a deceased individual, the rental income will be reported on schedule E (Form 1040) attached to a Form 1041 US Tax Return for Estates and Trusts.
