Hello there, accounts63.
It's a good thing that you may have entered your supplier bank details in the time you used QuickBooks Desktop. However, it is not available in QuickBooks Online. I can see how ideal to have this kind of feature in the Online product.
Alternatively, you can keep a copy of their bank details. Another option is to find an app that helps us in handling information. We can look for the app that can surely help you out with this by going to this link: https://apps.intuit.com/app/apps/home
Please let me know if you have other questions. I'll be around to assist you. Hope you're well and safe!
