A QuickBooks company file contains all the financial records for a single business. If you're just starting out with QuickBooks, the first thing you must do is create a QuickBooks company file for your financial records.
We recommend that you use Express Start to create your QuickBooks company file quickly and easily.
To use Express Start to set up your company file:
Choose File > New Company. The QuickBooks Setup window opens.
Click the Express Start button.
Not ready to create your company file yet? QuickBooks provides you with sample company files that you can experiment with to see how QuickBooks works.
Note: You can't use a sample company file for your own financial transactions. You must set up a company file just for your business.
Starting a QuickBooks company if you've already been using Quicken or QuickBooks