QuickBooks 6000 83 error occurs when there is an issue in trying to open the company file. This error occurs whenthe 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 missing some of the important installation files. The resolution of this error can be done by reinstating the data from the local copy and accessing it again. Iintuit phone number for getting customer support is +18772499444 and all the customer problems can be resolved.