Trout CPA a full service certified public accounting firm with offices in Lancaster, Carlisle, and Mechanicsburg, PA. Since 1929, we have provided quality accounting, auditing, tax, and business consulting services to our clients in the Central Pennsylvania region. Our firm consists of experts in a variety of financial areas enabling us to assist a diverse group of companies and individuals. We have the expertise to provide complete financial services to individuals, large and small businesses, as well as other agencies and organizations.