Same here --- TurboTax calculated the penalty and I was able to efile, yet once I did, Form 2210 went missing – it’s no where to be found, not in the worksheets or anywhere else. And, it seems to have applied the date I first tried to efile (but the glitch had blocked that) to calculate instead of the date my returns were actually finally able to be efiled (once the software was updated), leaving me with the wrong calculation, one based on the date I wanted to file but couldn’t, not the date I finally was able to file. Ugh.
