Reject Code IL1040-10000-1 ?

[jvipul-live-in]

The Secondary Taxpayer Prior Year Adjusted Gross Income (AGI) did not match the Prior Year AGI on the Illinois Department of Revenue (IDOR) production file. If your AGI was adjusted in the prior year due to an amendment or correction by you or IDOR you should report the most recent AGI. You can find your prior year AGI by logging in to your MyTax Illinois account at mytax.illinois.gov or by referring to the line by line on an adjustment letter received from IDOR. Please note that to be on the IDOR production file the prior year return must have been accepted and processed. If PC Online return is Married Filing Joint, at least one of the following Secondary Taxpayer signature fields must be present and match the IDOR production file: Secondary IL-Pin, Secondary Prior Year AGI, or Secondary IL Drivers License/State ID Number. For more information, visit our website at tax.illinois.gov or call Taxpayer Assistance at xxx xxx-xxxx M-F from 8 AM to 5 PM.

[Mike9241]

call Taxpayer Assistance at xxx xxx-xxxx M-F from 8 AM to 5 PM.

the issue could be that for federal purposes the AGI from the originally filed return is required while Il wants from the latest version. if you did not amend  2022 then check the entries for the other items and if that does work call them.  

it's hard to give a definitive answer because you did not specify your filing status for Illinois in 2022 or whether you filed timely or not. 

[ee-ea]

Unedited phone number is here

https://tax.illinois.gov/aboutidor/contactus.html

[brkchu]

I figured this out after certain tries that worked for me.

1. Double-check names

2. Double-check AGI

3. If you have ever had IL PIN requested, use it.

I kept using my DL number, thinking I could just use it since I have it handy.

I kept getting rejected.

Ultimately, IL PIN worked as soon as I used it.

[Mike9241]

if you file jointly in 2023, both your AGIs for Illinois should be the same as line 11 on the federal 1040 which should agree with line 1 on the 2023 Illinois 1040. if not you need the separate AGIs from the separate 2023 returns. 

agi is only one of several verification methods. this is from Illinos

If you did not receive a booklet in the mail, go to Illinois Department of Revenue's web site at www.revenue.state.il.us or call 800-732-8866 to obtain your IL-PIN. Have your driver's license and last years tax return available when you make this call.

To assure your return will be processed successfully, you may provide one of the following optional items in addition to the mandatory IL-PIN:
* Prior Year Adjusted Gross Income, IL-1040 Line 1
or
* Primary or Spouse's Drivers License

getting an iL-pin 

https://mytax.illinois.gov/_/