You can press F2 key or use CTRL + 1. A screen will pop up that shows information about your QuickBooks data file, and among that will be a box that shows the location of your file.
Additionally, I want you to get the most out of QuickBooks for your business. You can check some articles that are designed to help you get acclimated with the software. They can be accessed at the following link: QuickBooks Tutorials.
Let me know if you need additional help. I'm always here to provide further assistance with anything QuickBooks related. Have a great day!