US Company Tax Preparation

U.S. Business Tax Preparation — All Entity Types

U.S. business tax returns vary significantly based on your entity type and tax election. Whether your LLC is taxed as a partnership, S-Corp, C-Corp, or disregarded entity, the filing requirements are different — and getting it wrong can result in penalties, IRS notices, or overpaid taxes.

USBase's licensed tax professionals prepare federal and state business tax returns for all entity types, maximizing your deductions and ensuring full IRS compliance.

Business Tax Returns We Prepare

• Form 1065 — U.S. Return of Partnership Income (Multi-Member LLCs)
• Form 1120-S — S-Corporation Income Tax Return
• Form 1120 — C-Corporation Income Tax Return
• Schedule C — Sole proprietor / Single-Member LLC (on personal return)
• State corporate and franchise tax returns (all 50 states)
• Schedule K-1 preparation for all members and partners

What's Included in Our Tax Service

• Complete preparation of all required federal and state returns
• Review of income, deductions, and credits for accuracy
• Maximization of all allowable business deductions
• Preparation of all supporting schedules
• E-filing with IRS and state agencies
• Year-round tax advice and planning support

Taxes for Non-Resident Owned Companies

Non-U.S. residents who own American companies still have U.S. tax filing obligations. A single-member LLC owned by a foreigner (foreign-owned SMLLC) must file Form 5472 and Form 1120. Multi-member LLCs file Form 1065. USBase specializes in tax compliance for foreign-owned U.S. entities — ensuring you meet all IRS requirements and avoid the substantial penalties for non-filing (starting at ,000 for Form 5472 violations).