QuickBooks update error 404 is a QuickBooks sync error that occurs when the QuickBooks desktop cannot connect to the Intuit server. This error can occur on both QuickBooks Desktop and  QuickBooks online. There are many solutions that can help solve this problem.

Several Methods Below with simple steps to Fix QuickBooks Error Code 404

Method 1: Reconfiguring the system settings

Method 2: Verifying the internet speed

Method 3: Changing the internet settings

Method 4: Updating and repairing QuickBooks