Hey so in the case of the US, the tax treaties covers both individuals and companies, it seems like the articles do not care of your business structure as long as you are a business or just anybody really who earns money from another country.
just wanted to confirm, articles in ANY DTAs will always cover anybody of any business structure whether it be a sole trader, company or just a non business individual.
seems like the tax treaties do not discriminate but wanted to double check based on exp with America!