How do i get a resale certificate for my LLC?
You just need a resale license which can be obtained from your local government. You should check with an accountant in your area who specializes in small business since there might be different requirements for different areas. Now from liability point of view you might want to setup a separate LLC since if something goes wrong with your current LLC or your future plans, you can easily ditch the problematic LLC and not lose the whole thing.