When to register as a foreign LLC?

[Eric Kluth]

My business is in Washington. I formed it in Wyoming because I will be marketing for deals in Oregon and Washington. I know I have to register in the state I am doing business. Do I have to register as a foreign LLC in Washington just because I am based there? My hypothetical question is if I only do deals in Oregon for 2013 and not in Washington, do I forgo not registering in Washington even though I am based there? And then next year I do business in both states. So I am wondering if I should register as I go along in whatever state I do a deal in?

Thanks