If I have a partnership or LLC, do I need to file a business extension or a personal extension — or both?

Most partnerships and multi-member LLCs are required to file a separate income tax return, which means you will need a business extension to cover your business tax return, plus a personal extension to cover your personal tax return. On the other hand, a single-member LLC is classified as a “disregarded entity” (or “pass-through entity”), which means the business activities are reported on the owner’s personal tax return. In that case, you would only need a personal tax extension to cover both you and your business.