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Edward913
Level 1
October 15, 2026
Question

Illinois Form 1040X

I’m filing federal and Illinois amended tax returns for 2025. The Illinois Form 1040 reflects my direction to apply the refund to 2026 estimated taxes, but the Form 1040X does not. The cover letter also does not indicate that the Illinois overpayment is being correctly applied as a credit to 2026.

 

The federal form 1040 SR and the Form 1040X agree in applying the overpayment to 2026 - as does the cover letter.

    1 reply

    BobKamman
    BobKamman
    Level 15
    October 16, 2026

    I wouldn’t rely on either IRS or the state to process the amended return before April 15, and I wouldn’t be surprised if their policy is not to accept any credit-elects this late in the year.  Is it such a huge amount, that your client can’t afford to pay it now and wait for a refund (which will probably include interest from 4/15)?

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