I had to get an attorney for the filing. I believe it costs around 1500 for the license. They take care of everything. With all the filings are done the attorney gives you a set of books with all the the state and federal filings and your license for hanging on the wall if you have a office-shop...
Getting a business license was the best decision I ever made. Mine is for carpentry but it can be broadened out as much as needed. I went into a LLC because of all the law suites being filed now days. My small business tax person takes care of all my taxes and it is amazing how many deductions...