@Carl wrote:
....what if I have two residential rentals and one commercial rental?
You do not meet the safe harbor requirements for aggregation in that instance.
For purposes of applying this revenue procedure, properties held for the production of rents are similar if they are part of the same rental real estate category. The two types of rental real estate categories for the purpose of combining properties into a single rental real estate enterprise are residential and commercial. Thus, commercial real estate held for the production of rents may only be part of the same enterprise with other commercial real estate, and residential properties may only be part of the same enterprise with other residential properties.
See https://www.irs.gov/pub/irs-drop/rp-19-38.pdf
