Thanks again @BillM223. I will poke around to see if I can possibly change the IL income in a similar manner.
As I mentioned, I contributed the remainder eligible amount as personal contribution in Jan 2021 to count towards 2020 - and at this time, I was living in PA.
I can't find the thread but I saw on a post that since the contribution was made in 2021 who is say it is from the portion of the money I earned while being an IL resident or a PA resident and so it's better to deduct it from the state where you were living when the contribution was actually made - which in my case is PA. It is for this reason I was hoping to deduct from PA and not IL. Appreciate your thoughts on this!
