How to correct payment made/applied to wrong tax year

[malditote]

When my wife and I submitted our 2019 taxes by mail we sent a check for $400 to be applied to the payment due for that year. Since we never saw our 2019 balance reflect the payment (check was cashed by IRS) I called the IRS by phone and the rep told me that the $400 check we sent with our 2019 taxes was applied to our 2020 taxes instead of our 2019 tax  bill (still don't understand why). He said to just include the $400 as a prepayment on our 2020 income tax return which should reduce our income and hypothetically give us a better return. Long story short, where in Turbo Tax 2019 do I enter the $400 payment we already made to the IRS? I looked everywhere in income/deductions and I can't find a field where I would write the amount? Anyone have any ideas on where or how to add this to turbo tax on our 2020 tax return?  

[ThomasM125 · Accepted solution]

You don't need to do anything with your 2019 tax return in TurboTax since your already filed the tax return with the IRS.

To enter the $400 payment in TurboTax for 2020, choose these options:

    1. The Federal option on your left menu bar

    2. Other Business Situations on the Your income and expenses page

    3. Estimated Tax Payments

    4. Federal estimated taxes 

    5. Enter the payment in the First quarter row