I am doing this for an individual federal payment on screen 3 under Electronic Filing Only Main Form.  I have check mark next to Electronic payment of balance due and for Electronic payment date (O) I have 4/1/2024 in the box.

On the letter it states the Payment will come out on April 15th.  

The settings of the letter is as follows:  The balance due will be directly withdrawn from your bank account on [FDD].