QuickBooks Error 12029 is amongst the 12xxx series of error codes and is also known as network time-out error. It shows that backend servers failed to revert to QuickBooks within the allotted time. The actual reason behind the issue is that firewall and internet security block QuickBooks from accessing the server. You can try to verify the security settings and authenticate the internet connectivity to fix the issue. Grab the most information using this short article. Dial our number 1.800.579.0391 if you need help from QB Professionals.