You cannot have it both ways. If you were claimed as a dependent by your parents who were in IL, you have to file an IL tax return. A dependent who lives away at school is considered to be "temporarily absent." You are considered to be an IL resident.
https://tax.illinois.gov/individuals/filingrequirements.html
From the link above:
an Illinois resident who was claimed as a dependent on your parents’ or another person’sreturn, you must file Form IL-1040 if
- your Illinois base income from Line 9 is greater than your Illinois exemption allowance, or
- you want a refund of Illinois Income Tax withheld from your pay.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
