QuickBooks users may lead to QuickBooks Error 12002 when QuickBooks is unable to utilize the internet connection. This generally happens due to the slow internet connection or network timeout. In addition, QB Error 12002 also appears when QuickBooks users try to update QuickBooks payroll. Why QuickBooks Error 12002 arises? Error 12002 QuickBooks arises due to many reasons. We have tried to discuss all of them as follows: Network timeout may lead to QuickBooks Error 12002. If the SSL setting is incorrect. When the internet connection is disrupted by internet security or firewall. Because of the poor internet connection. If the Internet browser has not been established as the default browser. https://accountantsquad.com/quickbooks-error-12002/