The reconciliation window in QuickBooks Online (QBO) is specifically designed to simplify the process of matching transactions between your accounting records and bank statements, Cowa.

When reconciling transactions in QBO, its primary focus is to verify that the totals for each transaction, including payments, interests earned, and service charges, are aligned with your bank statements, not on assigning additional details like assigning class codes to transactions. This is to ensure that the reconciliation process, which is mainly focused on matching balances, is separated from transaction organization, which happens either before or after reconciliation.

Additionally, when interests earned and service charges are imported through bank feeds, these transactions are assigned to default categories or accounts by QBO. However, class codes aren't automatically applied. This is because class tracking functions separately from the reconciliation process and should be assigned manually for more detailed reporting

To address this, you can consider setting up some bank rules in QBO. While these won't assign class codes directly, they can still help you to automatically categorize and streamline other aspects of transaction entry, making things more efficient for you to review and assign class codes for later use.

Feel free to reply to this post if you need further assistance.