QuickBooks Error H505 is an error which can plagued your QuickBooks software application. This error holds several causes to occur. If you have not configured your settings correctly, then this error can occur. As this error is related to network issues. The second reason to behold is that your system has firewall which is protecting the company file and is not making it working properly.It would be better if you dial 1-888-412-7852 our number to get a Fix QuickBooks error H505. Our team is surely there to help you.