Thanks. I find it strange that if I pay the RMD taxes in January on the RMD, I still get penalized for the entire amount at year-end if I under pay later in the year because of an unexpected income. On my Virginia taxes, that state recognizes that the taxes were paid in January and avoids the penalty. I found that if I credit the Federal tax payment as an ACH payment under Estimated Tax Payments, then TT calculated the penalty correctly.
