Thank you for the guidance but unfortunately, I could not find any way to dispute the underpayment charge in the Other Tax Situations / Underpayment penalty tab.
I apologize for the clumsy wording of my query and I will try to clarify my question.
I sold a portion of a mutual fund holding in my brokerage account (a non-IRA/Roth account) in late Dec triggering a capital gain which I knew would be tacked on to my ordinary income thus incurring a Federal tax payment due. However, I believe it is a question of timing... since I did not owe any Federal tax for the entire year, until I sold my mutual fund holding in late Dec, why do I owe any underpayment penalty at all?
