Turkish citizen forming LLC in Maine
I already have a checking and savings account here and can open a business checking account too if I want to start up an LLC in Maine.
What are my options as far as working remotely from Turkey and billing my employer using my LLC? Is this legal? Am I going to pay taxes and is it going to be based W8-BEN and 30% tax rate? Any other fees that I will need to pay?
Technically you can own an LLC being a Turkish citizen living in Turkey. In fact you don't even need to form an LLC in Maine, your LLC can be in any state (since all your services are provided remotely).
Once your LLC is established you should open a bank account for it, to separate your business funds from the personal ones. This is where you will deposit the payments made by your employer, and then you can distribute the profits from that bank account to your personal bank account.
As far as billing your employer goes, you would do it as any other service provider would, and the employer would make the payments to your LLC. Since LLC is a pass through entity you would then be able to distribute the profits of the LLC to yourself personally without paying any taxes on the company level and only paying personal income taxes on those distributions (but you still need to file separate tax return for the LLC).
For better understanding on how your personal taxed would be calculated I would recommend you to consult with a CPA.