Key Factors Leading to the QuickBooks Payroll Not Working Issue The main reason behind this QB online payroll not working error is the connectivity issue. Below, we have mentioned the pointers;  * An unstable or weak internet connection may interrupt payroll updates * In some cases, Internet Explorer or firewall settings can interfere and lead to these errors * Payroll data is being sent while QB is running in multi-user mode * The security certificate of your QB app may be invalid or expired https://seolistinghub.com/post/the-right-ways-to-rectify-the-quickbooks-payroll-not-working/