Are you confronting error code H505 while using the QuickBooks software? If yes, then you need to first find the root of the problem due to which this error occurs. It can be due to poor server connection or when antivirus or other software installed on your system does not allow you to access the accounting software. Moreover, due to damage.ND file and incorrect hosting configuration one can witness this error. One can always solve this issue on their own. Still, it is recommended to take the guidance of experts by dialling QuickBooks Support that stays available 24 hours in a day without any time and location constraints.