The step-by-step instructions I painstakingly wrote up earlier this year for making business replacement income tax estimated and extension payments are now out-of-date, because IDOR revamped their MyTaxIllinois website in September (grrrrr). So here are the basic instructions (screenshots are coming soon, but this will have to do for now):

— Log into the business’s My Tax IL account
— On the ‘Summary’ tab, look for the ‘Business Income Tax’ section
— Click on the link for ‘View more account options’

There are two ways to do it from here; the first is:
— In the ‘Account Options’ section, click the link for ‘Make An Estimated Payment’
— Select the period you want to pay (which is 12/31/2021 for tax year 2021 — choose a later period if paying estimated taxes for 2022)
— Click the first ‘Add Payment’ hyperlink in the Payment Schedule table for each payment you would like to schedule.
— If your payment information is saved in MyTax Illinois, then in the ‘Choose’ tab you can select the dropdown under ‘Payment Channel’
— Otherwise, select ‘New’ and enter your company bank info.
— In either case, on the right where it says ‘Payment’, you can change the payment’s debit date and enter the amount.
— Click Submit, and re-enter your password for security purposes

Alternatively:
— In the ‘Periods and Submissions’ section, click the link for ‘View Account Periods’
— Click the 12/31/2021 link so that your payment is applied to tax year 2021 (or a later period if paying 2022 estimated quarterly taxes)
— In the upper right corner of this page, click the ‘Make A Payment’ link
— Select the ‘Bank Account Debit’ link
— Click the IL-1120-ST Payment link (ST denotes a “Small Business” payment)
— Enter the amount you want to pay in the Amount and Confirm Amount fields
— Click Submit, and re-enter your password for security purposes

Congrats, you did it!

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