IRS Form 1120-S

Income Tax Return for S Corporations

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IRS 1120s tax form

What Is Form 1120-S?

Form 1120-S is the U.S. Income Tax Return for S Corporations. It’s an informational document that lets the Internal Revenue Service (IRS) know how much income your business made and how much tax you owe.

Related Information

How to Fill Out Form 1120-S for S Corporations

Guide to completing IRS Form 1120-S for S corporations. Learn about deductions, income reporting, and tips for accurate filing.

Corporate Tax Return & Schedules Explained

File Form 1120 online for corporate tax returns. Understand the key schedules, from capital gains to foreign assets, for accurate and efficient filing.

Key Tax Deadlines For Small Business Owners

Curious about the business tax deadlines that you should mark on your calendar? Given are the details of the deadlines for filing small business tax returns.

A Guide for S Corporations

Find all that you need to know about Form 1120-S — what it is, what are schedules, how and when to file & more.

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