Hello there, @arcticnathan09. 

I'm here to guide you with the reports in QuickBooks. 

When you run the Fixed assets report, you'll need to click the transactions manually to see the Serial Number. It's because custom fields are created on the item. Items don't show in the report unless you open the transaction and see the details.

If that doesn't work, you'll want to run the Verify Rebuild tool to help you resolve Potential Data Issues in QuickBooks Desktop. 

Here's how: 

1. Go to the File menu.
2. Choose Utilities.
3. Click Verify Data.

If you see these results:

• QuickBooks detected no problems with your data, no further action is needed.
• When there's a specific error message, you can search it in our QuickBooks Desktop support site for specific instructions.
• Your data has lost integrity, it indicates that there's data damage, we can follow the steps below to correct the problem:

1. Choose the File menu.
2. Select Utilities and then choose Rebuild Data.
3. You'll receive a notification to backup your company file, and then click OK.
4.  Once done, the Rebuild Data utility will start.
5. When you get the message, Rebuild has completed, Click OK

For future reference, take a look at these articles about managing reports in QuickBooks Desktop:

• Understand reports
• Customize reports in QuickBooks Desktop

Get back to me if you have additional questions. I'll be here to guide you more.