I've got the information you need about the QuickBooks Online payments feature, @angabel33.
There’s no fee when sending invoices to your customers after activating the online payment feature. QuickBooks Payments will only charge a fee for each electronic customer payment you receive. The amount depends on how you process the payment.
You can visit the QuickBooks Payments website to see the updated rates and pricing. Also, refer to this reference to learn more about payment processing fees and when the funds show up in your bank account: What are the fees for QuickBooks Payments?
I have here an article and a video tutorial to get you started with QuickBooks Payments:
If you have any other questions or concerns besides the online payments feature, please don’t hesitate to reach out again. I’ll be here to help. Have a great day and always take care!