This sounds like the exact problem I'm having. I got this same error today. I also do not have an inherited IRA, and I do have an underpayment penalty so I don't want to wait until March 5 because the amount I owe will increase each day.
It's pretty frustrating that we had to wait 3 weeks for the Form 2210 Underpayment penalty issue to be resolved so we could e-file, now we have to wait for this problem as well.
