Anderson Professional Services 17620 Grand Ave, Lake Elsinore, CA92530 Anderson Professional Services, or APS, is a professional bookkeeping and tax service located across from Barren's…More Furniture on Grand Avenue. The standalone office is very secure with an electric razor wire fence surrounding the parking lot. Opened in 1991 by owner Kristin Anderson, APS is open to businesses and individuals alike. Tax services include electronic filing, amendments, audit representation and more. Bookkeeping services include monthly and quarterly financial statements, year-end statements, payroll services, check writing and notary services.