I filed original tax return; discovered error, created 1040x and having issues filing 1040x.  When I attempt to file from return (rather than going to EF Center; message states "Federal Return not completed", although no errors detected when error function run.

EF Center EF Status states duplicate SSN/EIN & selecting "EFnow" results in Electronic Filing error "Another return with the same taxpayer SSN is present in the EF View.  Do you wish to continue with the convert/transmission of this return? Selecting 'yes' results in message that the selected return is identical to tht of another return in Electronic Filing HomeBase view which has been e-filed.  It tells me to open the return and modify the SSN/EIN so that it is unique and then reselect the return for conversion.

I need suggestions how to complete filing of amended return.  Thanks in advance.

Richard