I'm also assuming that the LLC is going to be taxed as a partnership (the default category).

If it had income or expenses, you have to file a partnership information return (Form 1065), which has K-1s for each of the members (partners), to be reported on their returns. It's generally NOT a good idea to file your individual returns if the 1065 hasn't been filed yet--particularly if you don't know the numbers that will be on it, as you'll have to file and amended personal return later.