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IRSCorporate Tax (1120 Series)

Official form guide

Form 1120-FSC: 1120-FSC

Form 1120{FSC} is the U.S. corporate income tax return for a Foreign Sales Corporation (FSC). File it to report FSC income, deductions, and compute the special FSC tax liability for the tax year covered.

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Form Overview

IRS Form 1120-FSC - 1120-FSC

Form 1120{FSC} is the U.S. corporate income tax return for a Foreign Sales Corporation (FSC). File it to report FSC income, deductions, and compute the special FSC tax liability for the tax year covered.

The form captures gross FSC income, cost of goods sold, allowable deductions, and the resulting FSC tax, plus identification numbers and shareholder information.

Risk Radar

Scan points
  • 1A missing signature invalidates the entire return.
  • 2Incorrect classification of sales as FSC‑eligible
  • 3Mismatched EIN or missing shareholder IDs
  • 4Mathematical errors on tax worksheet
  • 5Omitting required schedules (e.g., Schedule K‑1)

Plain English

If your company is classified as an FSC—a foreign corporation that sells U.S. goods—you must file this return each year. It tells the IRS how much profit the FSC earned and calculates the tax that applies only to FSCs.

Submission Date

  • Filing date: 2026-02-12 08:10:39
  • Preparation window: collect IDs, supporting records, and signatures in advance.
  • Final review: verify names, dates, and required fields before submission.

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Glossary Terms

identificationincome taxliabilityforeignincomegross

Hover a term to preview the meaning.

What this form is for

  • Use when you are an active Foreign Sales Corporation
  • Do not use for regular U.S. corporations; they file Form 1120
  • If the entity ceased FSC status, file the final FSC return and then switch to Form 1120

Form selector

Use this form or another form?

FSC has been terminated

Regular corporate tax rules apply

✓ Verify termination date before filing

Form 1120 (final)

FSC qualifies for a de‑emed FSC election

Different tax computation

✓ Confirm election approval

Form 1120‑FSC with election statement

FSC is a small foreign corporation with no U.S. sales

Standard corporate filing

✓ Ensure no FSC activity exists

Form 1120‑F

Deadline or filing window

The return is due the 15th day of the fourth month after the fiscal year ends (e.g., April 15 for a calendar year). If the due date falls on a weekend or holiday, the deadline moves to the next business day. Extensions can be requested using Form 8868, extending the filing deadline by up to six months.

  • —Gross FSC sales | Sum of all U.S. sales | Total FSC income | Verify sales are FSC‑eligible

Checklist

What you need before filling it out

1

Gross income section

Sales invoices to U.S. customers · Sales ledger or export documents

⚠ Often omitted foreign sales✕ High
2

Cost of goods sold

Purchase orders, production records · Accounting COGS schedule

⚠ Misallocation of expenses✕ Medium
3

Shareholder information

Shareholder list, EINs · Corporate records

⚠ Missing or outdated IDs✕ High
4

FSC tax worksheet

Worksheet in instructions · Computed tax amount

⚠ Formula entry errors✕ Medium
5

Signature block

Authorized officer signature · Physical signature or digital signature

⚠ Blank or illegible signature✕ Critical

Before you submit

  1. 1Confirm the form edition matches the tax year
  2. 2Validate EIN and FSC identification numbers
  3. 3Re‑calculate gross income and deductions independently
  4. 4Cross‑check all schedule totals with the main form
  5. 5Ensure the FSC tax worksheet total matches line XX
  6. 6Attach all required schedules (e.g., Schedule K‑1)
  7. 7Sign and date the return
  8. 8Include a payment voucher if tax is owed
  9. 9Use the correct IRS mailing address or approved e‑file channel
  10. 10Retain a copy of the signed return for records
  11. 11If filing electronically, confirm acceptance code
  12. 12If filing by mail, use certified mail and keep receipt

How to file this form

  1. 1Print or download the 2024 Form 1120‑FSC PDF
  2. 2Enter identification data and fiscal year information
  3. 3Complete Schedule I for income, Schedule J for deductions
  4. 4Run the FSC tax worksheet from the instructions
  5. 5Enter the computed tax on the main form
  6. 6Attach Schedule K‑1 for each shareholder
  7. 7Sign the form and attach payment or refund voucher
  8. 8Mail to the Service Center listed or submit via MeF

Known limitations

  1. 1Instructions may reference outdated address if not checked for latest edition
  2. 2Electronic filing is limited to FSCs that meet MeF eligibility criteria
  3. 3The form does not calculate interest or penalties automatically
  4. 4Some foreign currency conversions must be done manually
  5. 5IRS guidance on FSCs changed after 2000; verify current tax treatment separately

Field map

Compact field-by-field guide

9 fields

Entity Info

2 items

Corporation Name and EIN

Full legal name of the corporation and its Employer Identification Number.

Requiredtext
Address and Date Incorporated

Current mailing address and date of incorporation.

Requiredtext

Income

3 items

Gross Receipts or Sales

Total revenue from business operations before deducting costs.

Requiredamount
Cost of Goods Sold

Direct costs attributable to producing goods sold by the corporation.

amount
Total Income

Gross receipts minus cost of goods sold and returns/allowances.

Requiredamount

Deductions

1 items

Total Deductions

Sum of all business expenses including compensation, rent, interest, taxes, and depreciation.

Requiredamount

Tax

2 items

Taxable Income

Total income minus total deductions.

Requiredamount
Total Tax

Tax calculated on taxable income using the applicable corporate tax rate, minus any credits.

Requiredamount

Signatures

1 items

Officer Signature

An authorized corporate officer must sign and date the return.

Requiredsignature
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Current form status
IRS

Form 1120‑FSC is currently available in the 2024 edition. The IRS website lists the latest PDF and instructions as of March 2024.

What changed or needs a fresh check

  • Edition date – verify the form is the 2024 version
  • Fee – no filing fee for Form 1120‑FSC
  • Mailing address – use the address in the current instructions
  • Electronic filing eligibility – confirm MeF acceptance
  • Signature block – include authorized officer’s signature
  • Extension filing – attach Form 8868 if needed

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Quick Facts

Any corporation that qualifies as a Foreign Sales Corporation must file Form 1120‑FSC.
The form captures gross FSC income, cost of goods sold, allowable deductions, and the resulting FSC tax, plus identification numbers and shareholder information.
The return is due the 15th day of the 4th month after the FSC’s tax year ends, typically April 15 for calendar‑year FSCs, with extensions possible.
File the completed form with the IRS Service Center listed in the instructions, either by mail or electronically through the Modernized e‑File (MeF) system if the FSC is eligible.
Errors can trigger penalties, interest, or loss of the FSC tax benefit, and may delay any refunds due.
1. Gather the FSC’s financial statements and identify all sales to U.S. customers. 2. Complete identification sections, then calculate gross income, COGS, and deductions on the appropriate schedules. 3. Use the tax worksheet in the instructions to compute the FSC tax. 4. Review all calculations, sign, and attach any required schedules before mailing or e‑filing.

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After you file

  1. 1Keep the signed copy and proof of mailing
  2. 2/e‑file receipt for at least seven{years}

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Source transparency

Copyright & Licensing - US Government Forms

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BrieflyGo links to and explains official public form sources. We are not a government agency, and this page is for general form guidance, not legal advice.

Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
Public DomainCreated by the U.S. federal government. Not subject to copyright (17 USC § 105). Freely copyable without restriction.
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