Jerry Mansfield's Back Bay Accounting & Tax (Boston): Back Bay Accounting and Tax, LLC is ... a full-service regional accounting firm, practicing in Boston. Our mission is to provide the finest quality service to small businesses and individuals on a timely basis at the lowest possible price. Our vision is to be a respected and prosperous firm in this region that people know and trust. To be the firm that small businesses and individuals choose first for the Accounting, Tax, IRS resolution and CPA services.