Hi Tim, 

As of now, the option to export only the parent account is still unavailable in QuickBooks. That said, I'll take note of this and share it with our Developers.

You can also visit this page to check the status of this suggestion: Customer Feedback.

As a workaround, you may want to run the Transaction Detail by Account report and then filter the account. Then, click the export icon and then remove the sub-account transactions on the spreadsheet.

I've also added this article as your guide about report customization: Customize reports.

I'll be around if there's anything that I can help with. Keep safe!