This error is faced by QuickBooks users when QB fails to access the server. One of the causes is timed-out requests due to internet latency. For solving QuickBooks Error Code 12029 you have to configure Internet security and system firewall for QuickBooks Payroll updates.
So, just read our complete article post and resolve this issue.
Article: https://qbsenterprisesupport.com/quickbooks-error-12029