Is there a way I can add the Memo/Description column to the "Bank Register" page??

Welcome to the Community, slhorton.

The option to add a description to your bank register is unavailable. However, you can enter the notes or descriptions in the Memo field of the transaction instead. This way, you'll be able to see them once you open your bank registers.

For good practice, you can categorize and match your transactions. This will allow you to confirm their accurate accounting and avoid any duplications.

You can reconcile your account after you're prepared to make sure your books are accurate. You can consult your reconciliation report to look for any discrepancies and promptly address them if there are any.

If you have any more queries regarding managing your banking in QuickBooks Online, I'm always here to help. I'd be happy to help you further if you merely mention my name in the comment section. Have a good day and be careful.