State returns for 1041 trust reporting

[WallyTheDog]

Completed federal form 1041 with K-1's as I am the trustee for my mother's trust who recently passed. There is only small post-death trust income via interest/dividends, but enough to go over the $100 complex trust exemption. Now TT business is asking which state return I want to complete. Here is the question, my mother lived in Idaho, but I (the trustee) live in California, with fellow beneficiaries in Idaho and Colorado. Which state returns do I need to complete for the trust's income after she passed?

[M-MTax]

Idaho: https://tax.idaho.gov/taxes/income-tax/business-income/guides-for-certain-businesses/income-tax-for-...

Colorado: https://tax.colorado.gov/estates-trusts (only if there is Colorado source income for nonresident trusts)

California: https://www.ftb.ca.gov/file/personal/filing-situations/estates-and-trusts/index.html

Very sorry for your loss