Thanks for getting back in this thread, Finaco. We greatly appreciate your continued engagement in the Community space. It's our pleasure to assist you in handling your unrecorded deposits in QuickBooks Desktop (QBDT).
You're correct that your previous reconciliation reports were not transferred to QuickBooks Online (QBO) during the migration process. As a result, you may still see your previous bank statements when reconciling your recent transactions. Similarly, when you migrated from QBO to QBDT 2023, the reconciliation data and reports were not transferred to QBDT as well.
To sort this out, you can close your statements before 2023 by either manually comparing your bank statements to QuickBooks and recording those missing deposits or generating a journal entry for those unrecorded deposits to resolve the balances. Once done, you can proceed to mini-reconcile them so you can close them and focus on reconciling your 2023 bank statements.
Regarding your QBDT 2020 data, it's a great practice to secure a backup copy of your company file after each of your reconciliation processes to make sure you can access your data anytime and if you ever encounter such issues. Check out this article for more details: Back up your QuickBooks Desktop company file.
You may check out these articles to learn more about the limitations and differences during the migration process of each program:
Furthermore, you can keep these resources that you can use in fixing bank reconciliation issues in QBDT moving forward:
Feel free to get back to us by clicking the Reply button below or posting a new query. We are committed to supporting your business endeavors and hope you have a productive day, Finaco!