I use desktop so hope this works. More hoops than a circus to jump through
- open the state tab and see if there's a link for estimated tax payments - if so, click on it. If not you'll need support
- on next page select estimated tax payments for next year
- yes you want to pay estimated taxes
- yes you'll be an illinois resident
- leave amounts and exemptions blank unless you really want TurboTax to generate estimates for 2026
- continue until you reach the payment option page
- Select any except "no estimates" and continue
- the next page should say "apply overpayment"
- i would select "apply a specific amount" continue
- enter the amount, and you're done
