Connectivity problems, incorrectly adjusted settings, or out-of-date system components are the causes of QuickBooks Payroll Update Errors of 15XXX Series. These mistakes, like 15271 and 15240, can interfere with payroll updates. In order to keep payroll processing running smoothly, fixing them entails checking network settings, updating QuickBooks, and making sure the system is compatible.If you experience any problems, call the QB support team at 1.855.738.2784.