Self-employment tax on rental income

I have an LLC which files a 1065 and I receive a K-1 that shows my rental income. I am actively involved in the business in that I choose tenants and hire repair professionals. Turbo Tax says that I must pay self-employment taxes, but elsewhere I have read that rental income is passive activity that is not subject to self-employment tax unless I am a real estate professional or provide some service to the tenants. Any guidance?