You only have to pay the amount on line 37 of form 1040.
Any estimated tax penalty on line 38 is already included in the amount on line 37.
See this IRS document, page 61.
[Edited 03/26/24 | 11:31 AM PST]
@Daniel_K
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
