QuickBooks, by Intuit, ss undoubtedly one of the best accounting software in today's world. But despite its unmatchable features and growing popularity, it tends to pop some or the other issue while at work. One such error is QuickBooks error 6000, which might occur due to firewall blocking the connection or corrupted or misplaced company files. In order to come out of this, you can either follow the below-mentioned step or simply get on a call with the expert technicians at the QuickBooks tech support number and ask for further assistance.