Based on the information you provided, you are not required to file a 2016 IL tax return.
From the IL DOE website:
If you were a part-year resident, you must file Form IL-1040 and Schedule NR, Nonresident and Part-Year Resident Computation of Illinois Tax, if
- you earned income from any source while you were a resident,
- you earned income from Illinois sources while you were not a resident, or
- you want a refund of any Illinois Income Tax withheld.