About Us Dennis C. Jackson Co., L.P.A. is a law firm which limits its practice to estate planning, trusts and probate. We work closely with tax and investment advisors in the estate planning area to provide financial consulting to our clients. Our services assist in maximizing the return on investments while assuring protection from a variety of adverse estate issues. Dennis C. Jackson Co., L.P.A. has worked with thousands of clients. Whether your affairs are simple or complicated, we can provide you with solutions that relieve your concerns for today and the future.