I am getting the error - Cannot read properties of null (reading 'getMonth')

Thanks you for reaching reaching us in the Community, Christa. I'm here to help get this resolve. 

Before we proceed, could you please give us more information about the button you clicked, the page where the error occurred, or any actions you took before encountering the error? This information will help us in identifying the most effective solution to resolve the error you're facing.

In the meantime, we can take some troubleshooting measures to identify if the error you encountered is related to your browser. 

To begin, let's access your account using your browser's incognito mode. This mode allows us to test whether the issue is arising from any extensions or cache stored in your regular browsing mode. Please use the following keyboard shortcuts based on your browser type:

• Google Chrome: Ctrl + Shift + N
• Mozilla Firefox and Microsoft Edge: Ctrl + Shift + P
• Safari: Command + Shift + N

If this fixes the issue, proceed to clear your browser's cache. This process will help the program run optimally. Additionally, I recommend using other devices and supported browsers to ensure everything works as expected.

Once you're all set, you might want to check this link for guidance: Reconcile an account in QuickBooks Online. This can walk you through the steps in matching your bank and QuickBooks balance seamlessly.

You can click the Reply button below if you have further questions about errors or any QuickBooks-related concerns you have. I will ensure that you receive the support you need. Stay safe.