I am sorry for your loss.
With respect to Illinois, the estate most likely does not have a filing requirement. Your mother appears to have had no connection with Illinois and did not pass away in the state.
With respect to Pennsylvania, you need to check the PA DOR web site since it appears as if there was Pennsylvania source income.
See https://www.revenue.pa.gov/FormsandPublications/PAPersonalIncomeTaxGuide/Pages/Estates-Trusts-Decede...
As for Minnesota, there most likely is a filing requirement since it appears your mother was a resident and passed away in that state.
See https://www.revenue.state.mn.us/filing-requirements-estates-and-trusts
Again, there should be nothing owed to the State of Illinois as a result of income that accrued to the estate.
