I finally got through to the IRS, I can't change the payment I made in January for 2020 to a 2021 payment. I am considering finishing my state taxes on Turbo Tax and then redoing them manually and adding all the payments into the equation to see where it ends up , but I'm not sure it is worth the pain. Then, I won't have the e file option either. Another factor is the state may reject the fifth payment because it was made in 2021 even though one state agent said to include them all.
