QuickBooks Error 12002 happens when the program has trouble connecting to the internet, frequently as a result of firewall configurations, interference from antivirus software, or erratic network connections. Payroll downloads, updates, and other online tasks are blocked by this problem. In order to fix it, you must make sure QuickBooks has the right access, check internet connectivity, and modify security settings. You can reach our team of QuickBooks professionals at 1.855.738.2784.