topic Filed state taxes wrong in After you file

Filed state taxes wrong

natalieweilandt — Mon, 09 Mar 2026 09:31:12 GMT

I filed my state taxes wrong.

I am a resident of Illinois but made all my money in 2021 in Colorado. I did not make any money in Illinois. I filed in both states but I needed to just file in Colorado. I accidentally submitted my state taxes to both - the Colorado one was accepted and the Illinois one was rejected. How do I delete my state taxes in Illinois?

Re: Filed state taxes wrong

Critter-3 — Mon, 25 Apr 2022 17:47:42 GMT

If you are an IL resident then you must report all your income from all sources to IL and also file a non resident CO return. If the IL return was rejected then it was not filed ... you should fix the rejection and resubmit it or paper file it.

Re: Filed state taxes wrong

natalieweilandt — Mon, 25 Apr 2022 17:56:42 GMT

I am not sure how to fix the rejection. The code says IL1040-8100-1.

Re: Filed state taxes wrong

natalieweilandt — Mon, 25 Apr 2022 17:57:38 GMT

Also - it is saying I owe money in Illinois but that shouldn't be right. I am paying state taxes to CO this year.