Tax Question

I became a Maine resident December 19th. I didn't get a job until January 2 or 3 or something like that.

So even though I was not an Illinois resident December 31st, do I need to file a part-time-resident tax form for both states even though I had no Maine income, or can I just file a standard Illinois tax form? Should I file a 0$ Maine return?

If anyone knows about this shit, thank you very much.