Cornerstone Tax & Accounting, L.L.C., in Okauchee, WI, is the area's leading accounting agency serving Lake Country and Waukesha counties since 2005. We specialize in individual and business tax services. For all your accounting and tax preparation needs, contact Cornerstone Tax & Accounting, L.L.C. in Okauchee. Visit us at our second location at 234 Oakton Avenue, Pewaukee, WI 53072.