Tax Year Prior to 2020: I have a Single-Member LLC with $0 income. Do I need a schedule C or SE?

In 2015 my LLC had a $200 loss. My accountant at that time filed a Schedule C and a Short Schedule SE (I am not sure why he filed a SE). For the 2016 year my LLC has $0 income and there's no employment involved. I've seen conflicting reports if I need to file a C and/or SE. Money is a concern for me, so I would like to stay with the DeLuxe version.