i worked at Deloitte for a bit. Deloitte internally has an entrepreneurial spirit. Essentially you can build a small business inside the company if you are incredibly talented at selling the work. People who become partners are responsible for interfacing with top level execs around the world. They win over the work of these execs and then hire internally talented people to complete the work. This then becomes their own internal organization with structure. A self contained business unit.
The employees are basically made to form connections and seek out work from day 1. People that need their skills reach out, but you have to sell yourself.
start in VA, list your primary residence in VA as your business address. As far as the state of VA is concerned you are still a resident of VA since your primary residence is there. You can list yourself as the agent for the business or you can hire an agent for the business in VA.
Taxes are based on the state where business is conducted.