Moved from New York to Chicago (Evanston, IL) on July 1st, Driving license is CA

I have the following situation:

 

  1. I work remotely (since 2024) for my employer whose headquarters is in Washington DC. 
  2. My driving license and mailing address for IRS is in CA (my parent's address. Mom helps me with taxes)
  3. Moved to NY end of 2023 and rented apartment. Filed 2024 taxes as NY resident and NY domicile.
  4. Moved to Chicago on July 1st 2025, renting apartment along with my girl friend. (we won't buy house)
  5. Plan to live in IL for at least next 2.5 years. Not sure where I will land up after that. 
  6. I continue to work remotely for the same employer. 

For 2025 year tax:

I think I may need to file 2 tax returns as partial resident of NY and partial resident of IL.

I guess I can make IL as my domicile which will also help lower my taxes as long as I live in IL.

 

Question:

I request your advice if I should do anything as I am thinking of making IL my domicile and For example:

  1. Should I change my driving license /address with DMV? (Currently parent's address in CA)
  2. Should I inform IRS of the new address of my rented apartment in IL ? (Currently parent's address in CA)
  3. Should I do anything else?

Thank you so much in advance for your advice.