Thanks for the reply been out of pocket.
So even though I made my April/June/Sept ES payments on time, given that one of my investment sales was in May I should have increased that June ES payment. Waited for months to get an answer back from a CPA I hired to navigate my tax question(long term cap gains vs income tax rate) and I simply had a brain freeze thinking I could make up for it on my January 15 last ES payment. Alas I'll be making the full 'catch up' payment this week for Jan 15 and waiting for my penalty letter:/. Lesson learned and thanks for the info....dumb on my part.
