March 27:"Understanding Payroll — Payroll Taxes, Records and Functions in QuickBooks" will be offered by the Small Business Development Center at Butte College. Details: 9 a.m.-noon at the Paradise Ridge Family Resource Center, 6249 Skyway. Cost: $40 prepaid, $50 at the door. Reservations: 895-9017. Learn about state and federal laws and regulations regarding business payroll function and record keeping. Examples of processing payroll functions will be demonstrated using QuickBooks. The trainer is a certified public accountant and QuickBooks ProAdvisor, and the payroll manual and functions will be provided.

April 2:The third annual Sierra Nevada Innovation Challenge is planned by Innovate North State. Details: 8:15 a.m. to 5:30 p.m. at Bell Memorial Union at Chico State University. Cost: $195, up. Reservations/info: www.innovate-northstate.comLocal and regional start-up companies will present at the annual event to reach angel investors, early-stage venture capitalists and other sources of capital. Speakers include Tim Draper of Draper, Fisher, Jurvetson; Tony Perkins, founder and editor of AlwaysOn Network and Going On management platform; and Ho Nam of Altos Adventures.