IND-463 error, when following the steps. 

If [ 'AmendedReturnInd' or 'SupersdedReturnInd' ] in the return is checked, then Form 1040
-X must be present in the return.

Form 1040x is present in the return. Appears to be trying to file the return and amended return at the same time. 

Had customer service on for half an hour. No resolution. Unacceptable.