Hi there, @mgon6933.
You've come to the right place. I'd be pleased to help you get past the Connection Has Been Lost error that you received while working on your QuickBooks Desktop.
The Connection Has Been Lost Error indicates that QuickBooks can no longer access your data file or a section of your data file. There are several possible causes of the error. First, you may want to try and restart your computer and your database server to see if this resolves the error. If that doesn't work, make sure QuickBooks is configured properly and the computer that hosts the data file is working properly.
If the issue persists after trying these steps, you may try running the QuickBooks File Doctor. This can help identify file related issues like this. Here's a good article that you can check out to guide you throughout the process: Error message: Connection Has Been Lost.
Also, I'd like to inform you that QuickBooks Desktop for Windows only works on a Windows computer. If you wish to use your Mac book, you'll need to have the QuickBooks Desktop for Mac.
These resources should help you get back o track.
Don't hesitate to let me know if you have any other questions about Connection Has Been Lost error or anything about QuickBooks. I want to ensure you're all set. Have a great weekend ahead!