I started LLC in Nov of 2017. Income is Social Security for 2017 and consulting fees for 2017. Do I file both LLC (Nov/Dec, 2017) and personal returns (all of 2017)

I presume I have to separate the LLC from personal:   a) 1/1 through 12/31 - all personal income / expenses on a personal return, and b)11/17 - 12/31/17 - 1099/LLC income/expenses only for this period on a business/LLC return.  Is that correct.