Following an audit I had to pay State taxes in 2020 for the 2017 tax year. Can I deduct and if so, where?

[xmasbaby0]

I HAD TO PAY BACK TAX OWED 

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.

[DoninGA]

You can enter the state taxes paid in 2020 for a prior tax year but not any penalties or interest due to the late payment.

To enter state income taxes paid -

• Click on Federal Taxes (Personal using Home and Business)
• Click on Deductions and Credits
• Click on I'll choose what I work on (if shown)
• Scroll down to Estimates and Other Taxes Paid
• On Other Income Taxes, click on the start or update button

On the next screen scroll down to Other Income Taxes Paid in 2020

Or enter state taxes paid in the Search box located in the upper right of the program screen. Click on Jump to state taxes paid