Same question (or, it seems, complaint at this point) as others. Did all the TurboTax and specified 4/15/2019 as pay date. Then forced to change it to 4/16/2019 at the last screen in order to file. The page says something like "you have to indicate a day at least one day in the future" AND "choose 4/15 or earlier to avoid penalties …" So, filing and paying through TurboTax is really only possible through 4/14, apparently.
An answer for TurboTax help to just not use TurboTax is not helpful.
