Can anyone tell me how to e-file an amended NY non-resident return?  In the EF center, it says duplicate social security number.  The instructions say to remove the other returns with the same social out of the EF center view.  I can't do that since the other returns have already been e-filed and cannot be removed.   When I tried to e-file, the error message says the SSN for the amended return is identical to that of another amended return in the Electronic Filing Homebase view.  Please modify the SSN and re-select the return for conversion.  However, there is no other return besides the original filing that has been accepted and I can't change the SSN.  Am I missing something?