Taxation depends on the kind of the business, an LLC with only one owner is a disregarded entity so the taxation goes to the owner which means foreigners does not pay taxes in the US for services that doesn't include US connections, for example if you are a designer you can sell services online to US people or people around the world and you won't pay taxes in the US (but you need to fill annual documents in the IRS)
I'm not sure if︀ I got this right "do you have any company formation company recommendation?" but if you︁ mean a company to form the company then I will suggest northwestregisteredagent since is the︂ one I use