As a founder of startups and lawyer, I strongly advise you to not do this work by yourself. There are firms that specialize in providing incorporation and tax services for attorneys; e.g. M. Burr Keim Company in Philadelphia. I would advise you to get a local attorney who uses these services for federal, state, multistate and local work. This falls under the category "never legally represent yourself". Even as a lawyer, I would never do this work myself.