Form 1120-S is the income tax return a corporation files for any year it is covered by an election to be an S corporation. It reports the corporation's income, gains, losses, deductions and credits. RepeatForm helps you reuse the corporation's details: upload the Form 1120-S you completed and the current blank, then review every line.
Tested with the irs.gov edition dated 2025
Plainly: this is one of the better fits. An S corporation files every tax year it is covered by the election, and its name, address, EIN and incorporation details rarely change. Those details can carry across. The income, deductions, shareholder count and every schedule figure do change, so they never carry as truth. If you prepare returns for several corporations, start each one from that corporation's own last copy.
The instructions say "Use Form 1120-S to report the income, gains, losses, deductions, credits, and other information of a domestic corporation or other entity for any tax year covered by an election to be an S corporation." The form itself says "Do not file this form unless the corporation has filed or is attaching Form 2553 to elect to be an S corporation." RepeatForm does not explain how to treat any item; read the full instructions on irs.gov.
The instructions say "A corporation or other entity must file Form 1120-S if (a) it elected to be an S corporation by filing Form 2553, (b) the IRS accepted the election, and (c) the election remains in effect." They add "Don’t file Form 1120-S for any tax year before the year the election takes effect." RepeatForm does not decide whether your corporation must file. The election itself has its own page, linked below.
For the due date, read the "When To File" section of the instructions on irs.gov: it ties the date to the end of the corporation's tax year and covers a corporation that has dissolved. It also says "If the due date falls on a Saturday, Sunday, or legal holiday, the corporation can file on the next day that isn’t a Saturday, Sunday, or legal holiday." To ask for more time, the instructions say "File Form 7004, Application for Automatic Extension of Time To File Certain Business Income Tax, Information, and Other Returns, to ask for an extension of time to file." and "Generally, the corporation must file Form 7004 by the regular due date of the return."
The instructions say "For returns filed on or after January 1, 2024, S corporations are required to e-file Form 1120-S if they file 10 or more returns of any type during the calendar year (including income tax, employment tax, excise tax, and information returns)." and "However, these corporations can request a waiver of the electronic filing requirements." For a paper return they say "File the corporation’s return at the applicable IRS address listed below," and the address depends on where the corporation's principal business is and its total assets. RepeatForm fills the PDF form; follow the IRS instructions, or your software or preparer, for how your return is submitted.
Item I on the form reads "Enter the number of shareholders who were shareholders during any part of the tax year". The instructions say "Attach a copy of each Schedule K-1 to the Form 1120-S filed with the IRS. Keep a copy for the corporation’s records and give each shareholder a copy." The shareholder count and the K-1s change with the year, so check them yourself.
Upload a Form 1120-S you completed and the current blank; RepeatForm carries the matching details across; you go through a review step, then preview the PDF before you export. Use last year's copy as the source, then change what differs. This helps most if you prepare returns for several corporations.
The IRS publishes a new Form 1120-S for each tax year. Carrying an earlier copy into the new one works for many answers, but some fields are renamed or moved and match only partly, so check every line on the new form in Review before you export.
The PDF checked for this page is the 2025 Form 1120-S. The About Form 1120-S page on irs.gov links the current form and its instructions. RepeatForm does not supply the blank form: get it from irs.gov.
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The instructions say "Use Form 1120-S to report the income, gains, losses, deductions, credits, and other information of a domestic corporation or other entity for any tax year covered by an election to be an S corporation." Whether your corporation has that election is a question for the IRS instructions or a preparer; RepeatForm does not decide it.
The instructions say "File the corporation’s return at the applicable IRS address listed below," and the address depends on where the corporation's principal business is and its total assets. They also say "S corporations are required to e-file Form 1120-S if they file 10 or more returns of any type during the calendar year". RepeatForm fills the PDF; it does not file anything for you.
The instructions say "File Form 7004, Application for Automatic Extension of Time To File Certain Business Income Tax, Information, and Other Returns, to ask for an extension of time to file." and "Generally, the corporation must file Form 7004 by the regular due date of the return." Check irs.gov for the date that applies to you.
You can reuse the details that stay the same, such as the corporation's name, address, EIN and incorporation date. The amounts, shareholder count and year-specific answers change, so enter them again and check every line on the new form in Review.
