Hello, Rebecca. Thank you for taking the time to perform those troubleshooting steps to isolate the issue. To address this further, please ensure you’ve signed out of any other active sessions where your email or User ID is logged in before attempting to save the new date format.
QuickBooks prevents certain actions for security reasons if the same email or User ID is active in multiple sessions. With this, make sure you log out of all other active sessions, including mobile apps or devices where QuickBooks might be logged in. Once all are signed out, wait a couple of minutes before signing back in to ensure you can save the new date format.
If you have additional questions, feel free to reply. We’re here to help.
