This was very helpful. My 2020 returns were rejected multiple times even though I was providing the correct AGI amount. I checked my account at the IRS site and was surprised to note that IRS had not processed my 2019 return I submitted by mail into their Dbase. So obviously there was a conflict between the AGI amount in IRS dbase which was zero at this point and the correct amount I was providing in Turbo Tax. Therefore changed the amount in Turbo Tax to zero and the return was then accepted. I then confirmed that my 2019 refund hit my bank account which was an indication that my return made it to IRS but probably due to workload in the Covid environment there is a delay in updating their Dbase.
