I appreciate you for joining us here in the thread, @oceanbeachesglass. I've got your back, and I'll ensure you can get through this to track the bills and invoices for your vendor, who's also a customer in your QuickBooks Online (QBO) account.

You can record a barter transaction to deal with transactions from your vendors who also acts as your customer in QBO. This way, it'll be easier for you to track their bills and invoices inside your system. I'll input the steps below so you can get started. To begin, you'll need to set up a barter bank account. Here's how:

1. Access your QuickBooks Online company.
2. On the upper-right corner, click the Gear icon and then select Chart of accounts.
3. Select New to create a new account.
4. Under the Account Type dropdown, select Bank.
5. Under the Detail Type dropdown, select Cash on hand.
6. Enter the account name. (ex. Barter Bank Account)
7. Select Save and Close.

Visit this article for further guidelines: Record a barter transaction.

Also, you can run separate reports for customers and vendor balance details reports. You'll then merge them by downloading the reports and manually editing them on the Excel file. This way, you'll be able to share the data with your customers, who also acts as a vendor. To begin, here's how:

1. Access your QuickBooks Online company.
2. On the left navigational bar go to the Reports tab.
3. In the search bar, type Vendor Balance Details report.
4. Click the Export icon beside the Printer icon.

You'll then repeat the process and then this time, run Customer Balance Details report.

In addition, here's an article to learn more about customizing a report to show specific data in QBO: Customize reports in QuickBooks Online.

You can also check this page about categorizing and matching bank transactions in QBO: Categorize and match online bank transactions in QuickBooks Online.

@oceanbeachesglass, Thanks for dropping by. If there's anything else that you'd like me to assist you with, Or if you have any additional QuickBooks-related concerns. Know that you can always get back to me anytime. I'll be more than happy to help you out again. Take care!