If you choose the Local Network option in the TaxAct® Enterprise Edition Setup Wizard, you need to have an existing local network already in place.
Typically, a local network centers around a server in your office which stores shared files. Users access those files from their individual workstations, but do not have copies of the files on their computers. This setup allows for easy backups and eliminates the problem of having several versions of each return in use. The program needs to be downloaded and installed on each user's computer.
If you have questions about how to set up a network, please consult Microsoft support.