I'll show you where you can download the app, rebeccab1.
You can go to http://quickbooks.intuit.com/apps/. Then, scroll down or look for Get the Apps tab. Click Free Download, and then select Download Now once rerouted to a different page.
We also have a general support article that'll show you some basic functions of the app: General Support QuickBooks App for Windows and Mac.
Please reply below if you need extra help. The Community is always here for you.