Tip!  Recommended to use the Sales-Other to easily identify all your invoicable items.  This category is not seen anywhere in the system by other users.

Select the ledger account you want this item to track too.

Tip!  The name field is what will show in the dropdown for available items to create invoice for.

Click the box for 'Restricted for Admin Invoicing'

While description is a required field, you can put a 'space' in this field to satisfy requirement.

Create an Item to be Available for Admin Invoicing

Verify Item is available under invoices