I checked my TurboTax, TaxAct and H&R Block tax softwares for the last 3 years and they include the ability to estimate the federal quarterly tax payments but not the state.
Hmmm...I just checked my TaxAct Premier 2018, TurboTax Home & Business 2019 and H&R Block Deluxe 2020, again. All were set up to include IL. All of them have next year tax estimating calculators for Federal but I could find no such calculators for IL State. Maybe it depends on which software version or which state?
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