Thanks @AmyC !
My situation is similar:
I am a resident of IL, and say traveled 36 days to CA in 2024; However, my company only considered 27 days of travel and attributed only that amount of my total income to CA. While I'm able to correct this and enter the appropriate non-IL sourced income when filing the IL returns, since this number does not match what's actually on my W2 (box 16), I am getting this e-file error.
Is the recommendation that I update the W2 manually with the corrected state income associated with each of IL and CA? The tax deducted of course wouldn't change, but the income attributed will.
Concrete example, just to elucidate:
income listed on W2: 100K; CA income 20K and IL income 80K.
My intended split: CA 25K and IL 75K.
Should I just update the W2 entry to reflect my intended split?
