Business & farm

I've been trying for hours to find an answer to my question, and I thought this might be close, but it wasn't.  I can't find a way to reach a human, so I'm pirating this reply box in hopes you won't think too badly of me, and that you can answer my question.  Here's my question:  I made Tax payments in Dec 2019 via IRS Direct Pay & SC MyDORWAY because I would owe Fed & SC taxes due to a Roth Conversion of an IRA, and I wanted to avoid an underpayment penalty.  I have the receipts, but where do I enter the additional tax payments in TurboTax Premier?  I've looked at every tax situation in TurboTax, but none address the voluntary payment of extra taxes unless it's via Withholding, which this wasn't.

Thank you [email address removed]