Thank you for getting back to us here on the Community page, @elindner.
Allow me to share additional information about recording the interest earned in QuickBooks Online.
For the banks that are connected to QuickBooks or online banking, you won't be able to add the interest earned before reconciling since the amount will be downloaded to your account automatically. If you can't see the amount downloaded to your bank, then you can record it manually by following the steps provided in this article: How to record the interest received for bank accounts.
Post again if you have any other questions. I'm always here to help. Wishing you a good one!
