How do I access the bank details for this bank so I can share with the customer?

Hello, clarke.

For security reasons, your complete bank details are not visible or sharable directly within QuickBooks (unless you've manually uploaded a document with that information).

If you need to share your bank details with a customer, you will need to retrieve that information from your bank's website/mobile app, or by checking your physical bank statement.

Let us know if you need anything else.