I am having the same problem. I amended my 2019 tax return and am trying to efile it as that is now supported by the IRS. I originally filed my 2019 taxes before April 15, it was accepted, and I received my refund. Now I am trying to efile the amendment and I am being told I need to "Correct My Signature Date"
What needs to be done so this amendment can be efiled? USPS has gone downhill and I would rather not rely on their inefficient service.
