To allow the sharing of your QuickBooks file, your best option is to have a computer network in place. This network will provide the foundation for you to then share the file between two or more computers. You can have either a wired or wireless network within your office.
It is also possible to take a backup copy of the QuickBooks file from one computer and restore it to a second computer to allow sharing of the information. However, I don’t recommend this if both computers will be entering QuickBooks data. If you do this, you won’t know who has the most recent copy of the data file, and things can get messed up quite easily. Your best bet is to talk to a local computer consultant about a network for your home or office.