I'm one of the dedicated and adept troubleshooting professional with a rich experienced in providing the correct guidance to QuickBooks users. I have helped numerous numbers of the users who had an issue with their QuickBooks account. I have sorted out several issues & errors and QuickBooks Error H505is one of them. If you are one of those who are encountering the same error, you should g with the instructions I direct. Error H505 may arise when the users try to access a company file. However, they can also face the same hurdles. They add some additional configuration in your QuickBooks company file. For the quick fixing of such kind of obstacles, I will help you by providing the necessary steps that you have to follow carefully. In this way, you can get rid of the problems and start working on QuickBooks flawlessly.