Is there a report I can run that shows all the expense in AP that are tagged to a customer for a date range

Yes, you can pull up and customize the Transaction List with Splits report with the details you need in QuickBooks Online (QBO), sutherland. I'll guide you with the details below.

1. Go to the Reports menu.
2. Enter the Transaction List with Splits in the Type report name here search box, and open the report.
3. Customize the Report period.
4. Click the Columns and add the Customer or the Customer full name.
   
   

If you need to include more details in the report, you can customize it to align with your needs.

Once you have the perfect set of filters, click the Save as option so you can run the same report in the future. However, if you want to export it, click the Export icon. Here's an article for details: Save a customized report in QuickBooks Online.

We're always here to help, whether you need assistance customizing your reports or have other QuickBooks-related questions. Don't hesitate to reach out!