Well here we are trying to e-file taxes and I just ran into this same problem, the 2020 Deluxe version is telling me I need to do an update when I try to do an update it tells me I'm up to date. Has anyone really found a fix for this mess? Shame on intuit for allowing this error to go on so long. I've used TurboTax longer than I can remember, going to rethink that decision next year.
