• What is QuickBooks payroll support phone number? The QuickBooks Payroll support phone number is 1-800-604-9974. For issues like payroll setup, tax filing, or troubleshooting errors, call their toll-free support line at 1-800-579-5576. QuickBooks offers expert assistance for all payroll-related concerns. For immediate support, dial 1-800-604-9974 or 1-800-579-5576 and get your payroll problems resolved quickly and easily.