Thank you for giving us an update on your concern, @Megaec12. Allow me to share more details on how to troubleshoot this error.
Since you've confirmed that the possible reasons stated by my colleague are not applicable, we may proceed with troubleshooting the browser. There are times that the program will react abnormally because of outdated data.
You can start with using an incognito browser to check if this is a data-related issue. If it shows the correct date while using an incognito, you can go back to the regular browser and clear the cache to avoid getting the same issue in the future.
Then, try to check if the last reconciliation date pop-up is still on December 2020. If that's so use another browser. To know the supported browser, you can check out this article: Clear cache and cookies to fix issues when using QuickBooks Online.
Then, you can proceed to the reconciliation process if it's all good. If not, I'd recommend contacting our Customer Care Team to have a better look at the issue. They also have the tools to verify your account and further check on the issue with their designated tools.
I've got your back if you have any questions about QuickBooks Online. Just comment back so I can assist you further. Take care.
