hi @blancojose222 ,
You should consider an importer tool like TPI to avoid any duplicated ones.
Hello there, blancojose222.
Once you've imported any information from one QuickBooks to another QuickBooks, it will not be duplicated. Your program will automatically detect that the file you're trying to import already exists.
You might find these articles helpful for your future reference:
You can always reach out to me if you have other concerns in importing.