Form 2210 that many were waiting for has an error. Column B of Part IV, Section A is not supposed to be used if you are a calendar year filer but TurboTax is using it in lines 20 through 24 (but not 25-26). In cases that there is an overpayment in column A (line26), that is not picked up in column C line 20. Column C, in my case shows an underpayment when there should be an overpayment because of this error. Note - the 2210 Penalty Worksheet does pick up the overpayment from Column A, so the penalty calculation appears to be right, but the form submitted to IRS will show wrong numbers.
