The way to answer your question is that if you earn all of your money in one state as an employee from that large company, you file a state income tax return in that state of employment.If you earn a salary from your limited liability company in another state but are earning that salary in the same state where your main job is, then that income is added to the amount earned in the tax return for the state where your main job is.As to income generated by the limited liability company in the other state, if it earns a profit then it pays state income taxes in the state where it is created and does business.For a follow to your question, you should consult with an accountant. Good luck.