Solved
I find instructions to do so for federal refund, but not state.
The option to apply your Illinois refund against your 2023 estimated payments is in the Illinois section.
- Go to the screen “A few things before we wrap up your states taxes”
- In Other Forms, select Estimate tax payments for next year
- On “Do You Want to Pay Illinois Estimated Taxes for 2023?” say YES
- Answer all the questions until you reach “Apply Overpayment?”
- Choose how much of your refund you want to apply to next year

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