The specific tax forms that you will need depend on how your LLC is classified. Disregarded entities (single-member LLCs) need Form 1040 to report annual income and Schedule C to report profit and ...

A single-member LLC is considered a disregarded entity ... which is part of the Form 1065 tax return, in the form of guaranteed payments. Any LLC that is taxed as either a S-corp or a C-corp ...