My business is a single-member LLC. Do I need to file for a personal or business tax extension?

Single-member LLCs only need to file for a personal tax extension (IRS Tax Form 4868), which will extend both their personal and business tax filing deadline. This is because your type of LLC (limited liability company) is considered a “pass-through entity” for income tax purposes, meaning that your business tax return is included as part of your Form 1040 personal return (on Schedule C).