Form 2210: What goes in the field asking for line D?

If the review screen is referring to Box D in Part II, this is when you choose to figure the penalty by annualizing your income if you received income unevenly throughout the year. See Form 2210: 

D. Your penalty is lower when figured by treating the federal income tax withheld from your income as paid on the dates it was actually withheld, instead of in equal amounts on the payment due dates. You must figure your penalty and file Form 2210.

If it is referring to Column D, this is where you enter different types of payments for the payment period ended 1-15-2025.

It may be easier to resolve the review questions by looking at Form 2210, or by going back to the Underpayment Penalty questionnaire in Other Tax Situations and answering the questions there.