I filed ON the deadline date of May 17, so as I mentioned earlier, I filed and paid on time.
Perhaps your statement about quarterly payments is the reason....the state document is saying I am being "...charged installment interest because you did not make the following required estimated payments" and lists 4 quarterly payments. Of course, state taxes are taken from my paycheck every month and I'm sure my employer makes the appropriate payments during the year. I owe extra due to dividends and interest. That's why I expected the penalty calculated by TT to cover the underpayment. Shouldn't TT use the correct method to calculate the underpayment? FYI, for 2021, I already increased my state (and federal) withholdings to reduce the amount I owe and perhaps eliminate penalties for 2021 taxes.
