How do I add Form 2210 for underpayment of taxes penalty? Is there a certain section I should go to on the federal return? I used the search engine but nothing came up.

We'll automatically generate a Form 2210 if your return needs it. Or you can revisit this section:

 

Note: You'll need your prior-year tax return to answer the questions.

 

To review your penalties and/or make adjustments

 

IRS Form 2210 (Underpayment of Estimated Tax by Individuals, Estates, and Trusts) calculates the underpayment penalty if you didn't withhold or pay enough taxes during the tax year.

 

Form 2210-F is a variation if you made at least 2/3 of your gross income from farming or fishing.