QuickBooks Error 6000 80 occurs when there is an issue in trying to open the company file. This error occurs when the data is restored or converted over a network, or there is a data corruption in the company file. This error occurs also when the software is not able to read the company file from the server. The resolution of this error can be done by reinstating the data from the local copy and accessing it again. intuit phone number for getting QuickBooks customer support phone number is +18772499444 and all the customer problems can be resolved.