How do I file taxes for my LLC?

For a single-member LLC, report all business income and expenses on Schedule C (attached to your personal Form 1040) — no separate business tax return is needed. For a multi-member LLC, file Form 1065 (partnership return) and issue Schedule K-1 to each member. Tax returns are due April 15 for single-member LLCs and March 15 for multi-member LLCs.

Filing requirements by LLC type: Single-member LLC: Schedule C + Schedule SE (self-employment tax) + Form 1040. Multi-member LLC: Form 1065 + Schedule K-1 for each member + each member reports K-1 income on their 1040. LLC with S-Corp election: Form 1120-S + Schedule K-1 + W-2 for owner-employee salary. Additionally, most LLC owners must make quarterly estimated tax payments (Form 1040-ES) if they expect to owe $1,000+ in taxes. State filing requirements vary — some states require a separate state business return, others piggyback on the federal return. Keep all receipts and records for at least 3 years (7 years recommended) in case of IRS audit.