Hi there, kevc66.
Exporting and merging sub-customers under the parent customer is currently not an option in QuickBooks Online (QBO). As a workaround, you can export it to an Excel file and manually delete the row of sub-customers name.
Here are the steps:
- Sign in to your QBO account.
- Go to Reports and enter Customer Contact List in the search field.
- Click on the Export icon.
- Choose Export to Excel.
Then, open the downloaded file and delete the row of sub-customers name from there.
I'm linking an article that will help you in the future: Manage your customer list.
Know that I'll pass your idea to our product developers and get this feature be implemented in the future. For now, I suggest checking back for any product updates and enhancements through our website: The QuickBooks Blog UK.
If I hear any changes about the option that you're looking for, I'll be sure to post the details here on this thread.
Please let me know if you have any follow-up questions. I'll be here to keep helping. Have a wonderful day.