PCI DSS consists of guidelines that merchants must adhere to in order to safeguard sensitive payment card information, aaron91. Allow me to provide the necessary links to help you provide the documentation to your customer.
To start, you can access these Community articles to learn how QuickBooks Payments ensures and maintains PCI DSS compliance:
You can also check out these pages from the Security Standards Council website for more info: PCI Security Standards Council.
Just in case you need additional resource materials about the QuickBooks Payments feature, I'll share these articles as well:
Rest assured that the Community forum is always here if you have other questions when receiving online payments from your customers. We're open around the clock to assist when you need it.