I believe when you go though the 2210 penalty section it will ask you for income by quarter, or actually the weird dates like Jan 1- Mar 31 and then Jan 1- May 31 then Jan 1-Aug 31, then Jan 1-Dec 31. See 2210 page 3.
https://www.irs.gov/pub/irs-pdf/f2210.pdf
I tried doing an online test return with lots of income and owing 21,000 tax due. I went to Other tax situations-Underpayment penalty and it only says No Underpayment penalty! So I couldn't get a screen shot to show you.
