the verbiage on Form 1040 for Line 37 is a bit misleading but it's covered in the IRS instructions to include the penalty from line 38 so this is all standard.
if you are on desktop in Forms mode double-click on the penalty then double-click on the penalty in the 1040 worksheet to bring up Form 2210 which will show the calculation. not sure equivalent for TT online but presumably the form is included in the PDF with "all forms and worksheets".
