The same exact thing happened to us when trying to file for 2020! They had responded to our 2019 return which was e-filed and asked for a missing form. We sent them the form and they confirmed that, and the update was that our refund was coming.
Two weeks later: IRS says they never received our 2019 return! The AGI for 2020 should be "zero?" How do we get our 2019 refund?
