Retirement tax questions

Right, basically I have taken out most or all of my RMD for 2022.

 

But as far as the 50% penalty, if they don't waive it, I think the penalty (excise tax, whatever) should only be on the RMD--Required Minimum Distribution, not on the whole amount I took out?  Does that make sense? As I was only "late" on the RMD, not the whole amount. So I'm wondering if I should state what the real RMD was in my letter to the IRS and say I took that "plus additional monies?"

(it's hard to even know the exact amount but I could say "the calculator shows."