Thanks for coming here with us, Michelemwong.
If you mean the gear wheel being missing, I recommend running the Verify/Rebuild tool. This helps identify the most commonly known data issues within the file and resolves it.
Before we begin with the troubleshooting, let's secure a backup of your company file. Once done, we can proceed to verifying and rebuilding your data in QuickBooks Desktop.
Here's how:
- Click File at the top menu.
- Go to Utilities.
- Select Verify. Then, repeat the first two steps and select Rebuild.

You can also check out this article for the detailed steps on running the Verify and Rebuild tool in QuickBooks Desktop for Mac: Resolve data damage on your company file.
Here's a guide to know anything about QuickBooks Desktop for Mac: QuickBooks Desktop Mac 2021 User’s Guide.
I'll be right here if you need anything about QuickBooks. Wish you all the best.