> Was this a rejection by TurboTax prior to sending, or a rejection by the Fed after sending?
A rejection by the IRS, on 24th Feb. I waited until today (6th Mar) to try again, and the return was accepted within minutes; whew.
No penalty owed in my case, but I had to go through Form 2210 to convince TurboTax of that. No special circumstances regarding the outstanding bugs mentioned in this thread in my case, either; so I can't speak to that.
