I'm having the exact same issue (also with DC, in case that makes a difference). The frustrating thing is that I just need to change some incorrect data I'd entered, but there appears to be no way to do that (at least without mucking about in the forms directly). For federal taxes TurboTax allows you to go back and change anything you've entered, but for state taxes (at least for DC), once you've entered something, you're stuck with it. So my workaround was going to be to just delete the state data and start again. But that has me stuck on a spinning beachball. I really have no desire to start everything again from the beginning.
