Welcome (back) to Washington. I just moved back here myself, but I am a little north of where you will be. You will want to set yourself up as corporation or LLC -- an accountant or lawyer can talk you through the advantages/disadvantages of both. You should also contact the Small Business Administration in Washington (http://www.sba.gov/localresources/di.../wa/index.html
), they can help you out with getting a license and making sure you comply with all the regulations.