You get to choose how your LLC is taxed.
Most single member LLCs choose "Sole Proprietor".
Most multi member LLCs choose "Partnership".
If you plan to have employees or if your accountant told you that you should be an employee of your LLC, choose "Corporation".
It is a good idea to discuss this with your accountant. If you are not sure, but want to complete the process, choose "Sole Proprietor" or "Partnership" and then contact your accountant to determine the correct choice.
If you choose Sole Proprietor or Partnership, you will have 75 days to change your election to Corporation if needed.