There are two options on how you can use QuickBooks from a different location, Carol.
First is to install or save the software in a multi-user network. This option requires both computers to be connected to the same network. Detailed steps on how you can use this function are discussed here: Set up and install a multi-user network for QuickBooks Desktop.
Another option is to one of the accredited hosting providers. This gives you the option to save and use QuickBooks in the service provider's servers anywhere and anytime.
Details on how you can take advantage of this option are shared in these articles:
Please add another reply below if you have other questions.
