Hi I’m Alex working in a Quickbooks team  in a renowned organization.Quickbooks Error 404 unexpectedly appears on any screen while performing the Quickbooks software. When Quickbooks is unable to sync with Intuit's server, this is the primary reason for Quickbooks error 404. I’m a Quickbooks Expert .So, if you face any problems regarding the quickbooks error 404 . So, you can contact my team.