I have 2 LLCs, one done on 1120S, and then i got one which i have to process using a schedule E identified as a business. what form would i use along with the Schedule E.

I formed a LLC a couple years for real estate investing. it is taxed as an S-corp using 1120S. I have now created another LLC for the properties that I am going to hold as rentals.  I was told I have to report these using schedule E.  what main form do I use the schedule E under, this is a business and not my personal rental.  I know I cant use a schedule C, its not used for LLC, Partnerships etc. .