An e-invoicing Self-Billing feature is an automation that is useful for easy bill creation, @qbo-serene. Allow me to share some information about this.

To generate a self-billed transaction, you can create a Purchase Order (PO) and enter the items there. Here's how:

1. Go to the + New icon and pick Purchase Order.
2. Select the Supplier field and enter the vendor name where you'll acquire the items.
3. Enter the list in the Category or Item Details, depending on where you placed them.
4. Type in all the necessary information. Once everything is good, click the Save and Close tab.
   

Once done with the PO, you can link it to a Bill. You can also look for a third-party application that can generate an e-invoice self-billed transaction since this feature is unavailable in QuickBooks Online (QBO).

Moreover, I'll share this article in case you have a supplier invoice that needs to be created according to the schedule you specify: How to set up a recurring bill.

Additionally, you can visit this article to locate your supplier's entries: How to view and edit supplier transactions in QuickBooks Online.

Don't hesitate to return here if you have additional questions about the self-billing setup, @qbo-serene. I'll ensure to help with that. Enjoy your day and have a good one!