@GeorgeDenseff
You didn't read my post carefully. Yes, 1/18/2022 is the correct due date for estimated tax payments (both Illinois and Federal) -- but in TurboTax Premier, IL Form 2210 is incorrect and incorrectly calculates a penalty if one pays the IL estimated tax on 1/18/2022. The IL Form 2210 in TurboTax Premier shows a due date of 1/17/2022, and thus incorrectly determines that a payment made on 1/18/2022 is one day late and thus gives rise to a penalty.
Intuit needs to correct this!
