QuickBooks payroll not working refers to issues encountered when trying to process payroll using QuickBooks. These problems can include error messages, inability to run payroll, incorrect tax calculations, or problems with direct deposits. Common causes are software updates, incorrect setup, or network issues. Resolving these issues often involves troubleshooting steps like updating QuickBooks, verifying payroll settings, checking internet connectivity, and sometimes contacting QuickBooks support for assistance to ensure smooth and accurate payroll processing. For persistent issues, consult QuickBooks support or a certified professional for assistance at 1.855.409.2300.