If i paid 2017 federal additional taxes due when I filed in 2018, is that amount deductable in 2018?

[DoninGA]

Federal income taxes owed and paid for a prior tax year are not reported on nor deductible on a federal tax return.

[kjleach]

Thanks

[SweetieJean]

But they may be on your state return,. If so, just the taxes paid, not any interest or penalties.