This does not work.  When I "save as" original tax file, I do have two files.  However, BOTH still retain the "EF ACCEPTED" status.  Proseries will not let me "convert and transmit" an amended NC return as I receive the message the return has already been converted and transmitted.   Do you have any other suggestions?  I will call Proseries soon, but assumed they were extremely busy with 2021 filing season opening this week.