I decided to do large ($108k) Roth IRA conversion just before the end of 2019, paid the estimated taxes due by the January 15 deadline, and now TurboTax is showing we owe $367 in penalties and interest on our 2019 return, which I speculate is because the system presumes we were supposed to have paid more estimated taxes quarterly earlier in the year. That does not seem fair to me because we didn't know we were going to do the Roth conversion until the end of the year. Is the penalty amount legitimate, or is this perhaps a glitch in the TurboTax software?
