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I made an  error in my 2020 MO state tax ,form, indicating a $2000 estimated tax payment from a $1000 2019 MO state tax excess payment rollover to 2020 MO state tax.  This appeared as a $900 overpayment for 2020, which I applied to my 2021 estimated tax.  This turned out to be an underpayment of my 2020 submittal, but now indicated a $900 estimated tax payment for 2021, which is in error (does not exist)

Now I don't know how to correct the 2021 MO state tax form, to remove the $900 within the TurboTax Delux program.