A few basics you need to know, because you asked a very basic question and that's a bit concerning, so heads Up:

LLC is a State construct, so make sure you know what applies to the State(s) being referenced.

Federally, Single member LLC (SMLLC) means it is not a partnership, by definition. That makes it a Sole Proprietorship, so that makes it Schedule C.

A multi-member partnership LLC is filed on form 1065.

In all of these above structures, there is no payroll for these people.

An LLC is a legal entity and can apply for Corporate treatment. It might be S corp, but does not need to be.

Corporate status means required payroll for the working members/partners/shareholders. But now there is no Owner, so no Owner draw.

You have a lot of due diligence to do for these considerations, as your tax payer won't know or has it confused when they present it to you. And get a reference for when they needed to get a new EIN for when they tell you, "We changed last year."

If you don't get this part right from the beginning, everything flowing out of here is going to be headed down the wrong route.