The QuickBooks H505 error code belongs to a group of errors that usually occur when users are trying to access a company file that is not located on their computer but it can also occur if they are accessing a file on their computer with improper configuration. Several error codes share similar solutions to this one and users have reported that the error mostly occurs in a multi-user environment and it definitely makes the communication between several connected devices or accounts more difficult in terms of sharing a single company file. QuickBooks Error Code H505 | Error H505 QuickBooks