What Tax Forms Do I Use to File My Business Return?

What Tax Forms Do I Use to File My Business Return?

Taxes| Accounting
February 04, 2026•3 min read

Published Date: February 04, 2026

Published By: Jac Cantos, Upcloud Accounting

Starting and running a small business is a huge accomplishment! Upcloud Accounting helps you navigate the complexities of filing your business tax return by outlining the forms required based on your business entity and organization.

Understanding Your Business Tax Filing Requirements

The paperwork and forms you need to use depend on your business entity and how it's organized. Here's a breakdown of how to e-file your federal tax return, based on your business structure:

Business Structures and Required Tax Forms:

  • Sole Proprietorship:

    • You are the business.

    • Report business income and expenses on Schedule C, filed with your personal income tax return (Form 1040).

    • The business itself is not taxed separately.

    • No separate business net worth reporting required.

  • C Corporation (C Corp):

    • File Form 1120 for your corporation income tax return.

    • More detailed than Schedule C, requiring balance sheet information.

    • Filed separately from your personal income tax return.

    • Corporation pays tax on its earnings, and shareholders pay tax on dividends (double taxation).

  • Partnership:

    • File Form 1065.

    • The partnership itself does not pay tax; it passes income, credits, and other items through to each partner.

    • Each partner receives a Schedule K-1 to report their share of these items on Schedule E, Part II of their Form 1040.

  • S Corporation (S Corp):

    • File Form 1120-S.

    • Income passes directly through to shareholders, avoiding double taxation.

    • Shareholders report their share of income and loss on their personal tax returns.

  • Nonprofit Organization:

    • File Form 990 to report income, expenses, balance sheet information, officers, and funding sources.

    • If you are paid by the nonprofit, you'll receive a Form W-2 or similar to report earnings on your individual income tax return.

  • Limited Liability Company (LLC):

    • Single-Member LLC: Can file Schedule C with your individual income tax return.

    • Multi-Member LLC: Can choose to be treated as a C corporation (Form 1120), an S corporation (Form 1120-S), or a partnership (Form 1065).

What are the deadlines for filing my business taxes?

Due March 15:

  • Form 1120-S (S corps, LLCs taxed as S corps)

  • Form 1065 (partnerships, LLCs taxed as partnerships)

Due April 15:

  • Form 1120 (C corps, LLCs taxed as C corps)

  • Form 1040 Schedule C (sole proprietors)

Tax extension due dates

If you filed for a business extension, the following due dates apply.

Due September 15:

  • Form 1120-S (S corps, LLCs taxed as S corps)

  • Form 1065 (partnerships, LLCs taxed as partnerships)

Due October 15:

  • Form 1120 (C corps, LLCs taxed as C corps)

  • Form 1040 Schedule C (sole proprietors)

Note: If any of the above dates fall on a weekend or federal holiday, the payment deadline falls on the next business day instead.

Understanding your tax filing obligations is crucial for small business success. Upcloud Accounting provides expert guidance to help you:

  • Determine the correct tax forms for your business structure.

  • Prepare and file your business tax return accurately and on time.

  • Ensure compliance with all applicable tax laws and regulations.

Contact us today for a consultation to discuss your business tax needs!

Upcloud Accounting: Virtual Outsourced Accounting and Bookkeeping Services in the Philippines

Upcloud Accounting provides reliable, tech-enabled virtual accounting and bookkeeping services designed for startups, freelancers, and growing small businesses across the United States. Our team of experienced accountants and bookkeepers delivers streamlined financial management so you can focus on scaling your business, without worrying about the back-office workload.

We specialize in increasing efficiency, automation, and transparency across your financial operations using modern cloud accounting tools. Whether you're a solo entrepreneur or an expanding company, our flexible and affordable bookkeeping plans ensure you get expert support at every stage of growth. For inquiries, contact our team at [email protected] or visit www.upcloudaccounting.com to learn more.

Disclaimer: This content is for general informational purposes only and should not be considered professional financial or legal advice. For guidance tailored to your specific business needs, please consult with a licensed accountant or tax advisor. For questions, comments, or feedback, feel free to email us at[email protected].

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