I was required to pay extra taxes in 2020 as a result of not paying enough estimated taxes in 2019. Where do I enter that extra tax amount?

[xmasbaby0]

The money you paid to the IRS for a previous year’s federal tax return is not deductible, so you do not enter it anywhere on your 2020 return.  If you paid taxes due in 2020 to your state or local government, you can enter that by going to Federal> Deductions and Credits> Estimates and Other Taxes Paid> Other Income Taxes.  You can enter the taxes you paid, but do not include any penalties or interest.

There are six states that allow you to enter the federal tax you paid on your state return--Alabama, Iowa. Louisiana, Missouri, Montana, and Oregon.  If you are filing in one of these states watch for the deduction when you prepare your state return.

[VolvoGirl]

Or do you mean you paid the quarterly Estimates towards 2020?

You can type estimates paid in the search box at the top of your return and click Find and it will give you a link to Jump To it.

OR

To enter Federal or State Estimated Taxes Paid, including a state estimated payment made in January for the prior year, go to

Federal on left or at top. Personal (Home & Business)

Deductions and Credits at top

Then scroll way down to Estimates and Other Taxes Paid

Estimated Taxes - click the Start or Update button