It's great to have you here, lizchris. I'd be glad to point you in the right direction to help you stay PCI-compliant with SecurityMetrics. Let me provide the details below.
Since you've mentioned need your payment processor domain name/ IP address, I recommend reaching out to your payment service provider's customer support team. This information is specific to your account and setup, so your service provider will be the best source for accurate details. You can contact them via phone, email, or through their support portal.
Once you have contacted them, request the domain name or IP address associated with your payment processing. This will provide you with the necessary information to ensure your PCI compliance with SecurityMetrics.
Additionally, you can also check out this article to learn more about PCI Compliance services in QuickBooks: Learn about the PCI DSS Compliance Services.
In addition to that, I'll provide this reference about working with PCI compliance which could be helpful moving forward: Intuit Security Center - PCI compliance.
Please let us know if you have other questions or concerns about the PCI compliance with Security Metrics in QuickBooks. We'll be glad to help you further. Have a great day!