Hey there, dd93. I'll share additional insights regarding the processing fee.

In QuickBooks Online, the processing fee charged may vary depending on the payment method used by the customer. It's important to note that the specific processing fees and payment options available in QBO can vary based on the payment processor you have integrated with your QBO account. 

For additional information regarding the fees associated with payment processing, you can check out this article: What are the fees for QuickBooks Payments?  It gives you all the details about the specific fees you'll encounter when using QuickBooks Payments to process transactions.

Furthermore, you can manually include service fees in your invoices to bill your customers accurately based on the services provided. By adding service fees, you can ensure that your customers are aware of the additional charges associated with the services rendered. 

I'll be around if you need more help managing invoices in QBO. I'm just a post away.