Thanks for reaching out here. It's great to hear that you'll be creating and tracking projects in QuickBooks Online. I'd be happy to help you get started!
Here's how to turn on the Projects feature;
1. Open Settings ⚙ in the top right of your QuickBooks Online dashboard
2. Select Account and settings
3. Open the Advanced tab from the left menu
4. Scroll down to Projects and set the toggle to Use project financial tracking