QuickBooks Error 102 happens when there is a difficulty with banking connectivity, which is frequently brought on by internet issues, incorrect login credentials, or bank server maintenance. The first step in fixing it is to look for updates or ongoing maintenance on your bank's website. After that, confirm your login credentials and manually update your bank feeds in QuickBooks. Additionally helpful are clearing the cache on your browser, making sure your internet connection is steady, and temporarily turning off your firewall or antivirus program.