PA Single Member LLC Tax question?

I am a single member LLC in PA. I am filing my taxes for the first year. Is there a requirement to file a 1065, or 1120S or do I file onto my personal as a sch C? I have losses due to taking a section 179. If I were to complete one of the p-through entity tax forms (e.g. S- corp 1120S), are the losses that would flow-through to my 1040 active losses or pive losses? Or, since I am single member, do I just do the Schedule C?