Hello there, sas00.
I've checked for similar reported issues on our list and didn't find any. QuickBooks updates its releases from time to time for up-to-date fixes on the company file. You can update it to its latest release again and from there we can see if the reconciliation window still indicates that the month of December is unreconciled.
Reconciliation report s will also help us further verify if there are changes made to the reconciled account. Let me show you how to pull that up:
- Go to the Reports menu and choose Banking.
- Click Previous Reconciliation.
- Select the Account and the Statement Ending Date, Type of Report, and what the report includes.
- Click Display.
If there's no report to display for the month of December, you can undo the reconciliation. Also, when you undo a previous reconciliation, your beginning balance reverts back to the beginning balance of the reconciliation before it. Thus, I'd suggest getting in touch with an accountant.
The articles below will also walk your though the process of reconciling accounts:
Keep me posted on how this works. I'm just here if you need anything else. Stay safe and have a great day!