2018 tax adjustment

[ucantphasethis]

I received a notice from the IRS explaining changes in my 2018 Form 1040 return.  The notice stated I had to pay $1,841 and I did  in December of 2020.  Is this something I am able to claim on my 2020 taxes, and if so, in which section do I complete it??  Thank you for your help.

[Bsch4477]

There’s no deduction for payment of your federal tax liability. 

[Mike9241]

however, some states use the federal taxes paid in the year for computing the state taxes.  so do you have state income taxes? if so, what state? 

[ucantphasethis]

We do have state income taxes.  It is the state of Illinois.

[DanielV01]

Illinois does not have a deduction for Federal taxes paid, so this will not assist your Illinois return, either.