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Form 1120-S: The Tax Form for S Corporations

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Form 1120-S: The Tax Form for S Corporations

Starting a business is a dream for many. It takes a lot of courage to make it a reality. There’s an endless list of business decisions to make and a lot of things to keep track of. One important decision is the type of business entity best suited for your organization's goals and targets. You have the option to choose a corporation, LLC, sole proprietorship or partnership. S corporations are a great option for small businesses or if you want to have 100 shareholders or less. Since every business entity has its own tax requirements, it might be difficult to keep track of everything. S Corp taxes are no different and the Internal Revenue Service (IRS) requires S Corps to file the 1120S tax form. We’ll cover everything tax-related for S Corps, so you’ll know how to file form 1120S when tax time rolls around.

Table of contents

What’s an S Corp?...Read more

What is a 1120S form?...Read more

Importance of Form 1120S...Read more

What are 1120S returns?...Read more

Who files Form 1120S?...Read more

Where to send 1120S form?...Read more

How to file form 1120S?...Read more

Form 1120S due date...Read more

1120 S form penalties...Read more

What’s an S Corp?

An S Corp is a type of corporation with the typical benefits of incorporation but has a different tax system, called a pass-through tax system. So income, losses, credits and deductions can pass through directly to the shareholders, all without paying corporate taxes. C corporations are different from S corporations in that they face double taxation since they are also taxed at a corporate and individual level.
Reasons to elect S status - limited liability protection against debt and lawsuits, pass-through taxation to avoid being taxed twice. Useful for self-employed, 1099, and freelancers managing taxes.

What is a 1120S form?

There’s no denying there are a lot of IRS tax forms. Since every business entity has its own set of tax rules and regulations, the tax forms are different. C Corps and multi-member LLCs file Form 1120. But for S Corps, instead of filing Form 1120, you’ll file the 1120S form.
Image with text explaining the three essentials to form a partnership - partners, business idea, and agreement. Useful for entrepreneurs and small business owners. No mention of self employed, 1099, freelancer, or taxes.

Importance of Form 1120S

1120-S is important for two reasons:
  • It reports income
  • It tells the IRS the percentage owned by each shareholder
This form will also help determine the credits or tax payments owed to the shareholders and they will report this information on their personal tax returns. A huge advantage for an S Corp is limited liability protection. When Form 1120-S is filed correctly, it ensures the S Corp is eligible for this benefit.

What are 1120S returns?

When filing 1120S, you’ll need to include certain returns.
Flyfin returns to report on Form 1120-S for income, gains, losses, credits, deductions, and payments. Relevant for self-employed, freelancers, and taxes.

Who files Form 1120S?

You’ll need to file Form 1120S if your business is an S corporation or an LLC that has elected to be taxed as an S Corp. Shareholders report their earnings on their personal Form 1040 income tax return, not Form 1120S.

Where to send 1120S form?

You can download Form 1120S from the IRS website.

How to file form 1120S?

The first thing to do is gather all the necessary information for 1120-S. You’ll need to have certain information on hand including:
  • Incorporation date
  • S Corp start date
  • Employer Identification Number (EIN)
  • Business activity code
  • Number of shareholders
  • Details about assets, profits, losses & deductions
  • Accounting method used
  • Stocks owned by the business
Image with text about financial statements, taxes, assets, and shareholder transactions. Includes details for income, losses, and deductions. Relevant for self-employed, 1099, and freelancer. FLY FIN.
On the first page, you’ll report basic information including deductions like salaries, advertising and interest. The next page, Schedule B, asks a lot of questions related to the business. You might be able to skip some of the questions. You’ll need to mention the accounting method used and a description of your business service or product. You’ll need to submit one Schedule-K per shareholder. On Schedule-K, you’ll report the shareholders deductions, credits and income. Some corporations may be required to fill out Schedule L, which is a balance sheet. If you file Schedule L, you’ll also need to submit Schedule M-1. Schedule M-1 reconciles the business’s profits and losses from the accounting books with the tax return. Schedule M-2 is another tax form that’s short but complex. It essentially tells you how much money you have leftover after the profit and losses, or your business’s balance. S Corps don’t file other tax forms, like Form 1065, Form 940, Form 990 or any tax forms related to LLCs. But a tax estimate calculator is a great tool to check on your S Corp taxes.

Form 1120S due date

S Corps must file 1120S tax form by the 15th day of the third month of the end of the tax year. Typically, this is March 15, unless this day falls during the weekend or on a public holiday. Plus, you’ll need to make sure you attach Schedule K-1 for each of the shareholders. If you need an extension, you’ll have to file Form 7004. Typically, shareholders will pay taxes on their S Corp profits when individual tax returns are filed by the April 15 deadline. If they own any 1099 tax or have self-employment deductions, these will need to addressed at this time too.

1120 S form penalties

The penalties for S Corps are very steep, and landing a penalty could cost you a big chunk of money. The failure-to-file penalty for 1120S is $195 for each shareholder per month it’s late. Even if you file on time, you might get slapped with this penalty if you fail to file complete information on Form 1120S. That amount can add up pretty quickly if you have a lot of shareholders. So it’s best to file Form 1120S on time and save your hard-earned money.

Form 1041-ES

Manage and pay your estate taxes with Form 1041-ES. Estate owe quarterly taxes if their liability is more than $1,000.

Schedule K-1

There are different Schedule K-1 forms for partnerships, S Corps and trusts. Schedule K-1s should be issued to taxpayers no later than March 15.

Form 8832

Form 8832 is an enabler that lets your business be taxed as an S corporation or C corporation, depending upon special needs.

Form 1065 (Partnership)

If you are an owner of a partnership, then you also need to be up-to-date with all forms used to file the IRS taxes.

Tax Forms for LLC

There are certain tax requirements and forms needed for an LLC business. Check how you can file your tax return as an LLC company.

Tax Forms for Sole Proprietors

When you are an owner of a Sole Proprietorship, you have to file all your taxes and keep up with forms like the Schedule C of 1040, Form 940, 941 and 944.

Form 1120 (C Corp)

Tax form 1120 is used for C Corporations to report profits, losses, gains, deductions and credits. Here’s how you can file your C corp taxes.

Tax Forms for NPOs

To maintain their 501c3 tax-exempt status, nonprofits have to file a Form 990 with the IRS to be in step with state and federal regulations.

Do LLCs get 1099s

1099 forms are normally used to report payments to independent contractors and freelancers, but they can report payments to LLCs.

Form 1041-ES

Manage and pay your estate taxes with Form 1041-ES. Estate owe quarterly taxes if their liability is more than $1,000.

Schedule K-1

There are different Schedule K-1 forms for partnerships, S Corps and trusts. Schedule K-1s should be issued to taxpayers no later than March 15.

Form 8832

Form 8832 is an enabler that lets your business be taxed as an S corporation or C corporation, depending upon special needs.

Form 1065 (Partnership)

If you are an owner of a partnership, then you also need to be up-to-date with all forms used to file the IRS taxes.

What’s FlyFin?

FlyFin caters to the tax needs of freelancers, gig workers, independent contractors and sole proprietors. But anyone can file taxes through FlyFin! FlyFin tracks all your business expenses automatically using A.I. to find every possible tax deduction. Then, the CPA team files a guaranteed 100% accurate tax return for you – to save you a couple thousand dollars and a ton of time on your taxes. Download the FlyFin app and have your taxes filed in less than fifteen minutes, saving time and more money on your taxes than last year, guaranteed.
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