I'll share details to help you send an invoice to a payee in QuickBooks Online (QBO), @nigelmcgregor.
Sending an invoice to a payee is unavailable. However, to invoice a payee (vendor) in QuickBooks Online, you must create another profile for the payee as a customer for you to send an invoice. Since you cannot have the same name as your payee in QBO you can add a number that will make it different.
Go toSalesand selectCustomers.
SelectNew customer.
In theCustomer display name (payee1)field, enter the display name for your customer (this is a required field).
Then, review each section and enter any other important customer info.
SelectSave.
Once done, Go to the Customers menu and find the newly created customer.
Click New Transaction and select Invoice.
Fill out the invoice details like Product/Service, Description, Rate, etc.