Who files IRS Form 1120S?
Ava Robinson
Published Mar 29, 2026
S corporations
Form 1120-S is filed by S corporations. This business structure allows a corporation to pass corporate income, losses, deductions, and credits through to shareholders for federal tax purposes.
What is the difference between 1120S and 1040?
A Form 1120 tax return is filed on a yearly basis for corporations. A Form 1120S tax return is filed by corporations that have elected the “S” status. These companies must pay tax at the corporate level and the individual must then pay additional taxes on their Form 1040 tax returns.
Can you file a 1120s on a personal tax return?
Yes, you are correct. You will file a Form 1120S for the S-Corporation. That return will produce a Schedule K-1 showing profit and other items based on the tax situation of the S-Corp. The K-1 will be entered on your personal tax return ( Form 1040) using one of the TurboTax personal products.
What’s the difference between a Schedule C and 1120?
Form 1120 is a little more involved than a Schedule C; it asks more questions and you must provide balance sheet information for the beginning and end of the tax period. Form 1120 is not filed as part of your personal income tax return.
Where can I get Form 1120S for S Corp?
Every S corp needs to file one, including LLCs that are taxed as S corps. You can download Form 1120S directly from the IRS website. Or if you use tax software, you can find it there too. Before you jump in to the form, you’ll need to have the following items handy:
What kind of tax return do you file as a C corporation?
C Corporation If you’ve incorporated as a C corporation, you will file Form 1120 for your business return. Form 1120 is a little more involved than a Schedule C; it asks more questions and you must provide balance sheet information for the beginning and end of the tax period. Form 1120 is not filed as part of your personal income tax return.