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What’s Covered in Your Form 1120 Filing

When you file IRS Form 1120 with LEDGERS, we manage the complete filing lifecycle - from data collection to final submission - ensuring accurate, timely, and fully compliant filing.

Complete Federal Tax Preparation & Filing

We prepare and file your Form 1120 with accurate reporting of income, expenses, deductions, and federal corporate tax liability, fully aligned with IRS requirements.

Extensions, State & Franchise Tax Support

From Form 7004 extensions to applicable state income and franchise tax filings (such as Delaware), we ensure no compliance obligations are missed.

Startup & Zero-Revenue Compliance

Even if your company had no revenue or activity, we handle correct nil filings to keep your U.S. C-Corporation compliant and in good standing.

Why Choose LEDGERS for IRS Form 1120 Filing?

When it comes to U.S. corporate tax compliance, accuracy and timing matter. LEDGERS combines expert-led filing with structured workflows to ensure your Form 1120 is completed correctly, filed on time, and fully compliant with IRS requirements.

Dedicated U.S. Tax Experts

Your Form 1120 is prepared and reviewed by experienced U.S. tax professionals who understand C-Corporation compliance, cross-border ownership, and startup structures.

Built for Global & Indian Founders

We specialize in helping Indian and foreign founders manage U.S. compliance without confusion — from EIN handling to IRS communication.

End-to-End Compliance Support

From Form 1120 preparation to extensions (Form 7004) and state & franchise tax filings, everything is handled in one place.

ROC Compliance Dashboard
Author

RAJESH KUMAR PATRA

Business Advisor

Updated on
24-01-2026

IRS Form 1120: Complete Guide for US C-Corporations

Every year as part of its federal tax compliance, C-Corporations in the USA must file IRS Form 1120 with the IRS. If a Corporation does not file IRS Fom 1120, it will be penalized and charged interest and may have complications in forming future banking or fundraising type relationships.

This guide explains what Form 1120 is, who must file it, due dates, penalties, and how Indian founders can stay compliant easily.

What is IRS Form 1120?

IRS Form 1120 is the U.S. Corporation Income Tax Return. It is used by C-Corporations to report:

  • Income earned during the financial year
  • Business expenses and deductions
  • Corporate tax liability
  • Taxes already paid

The form helps the Internal Revenue Service (IRS) assess the company’s federal income tax.

Who Needs to File Form 1120?

Form 1120 must be filed by:

  • US C-Corporations
  • Delaware C-Corps and other state-registered C-Corps
  • US companies owned by Indian or foreign founders
  • Startups with zero revenue (Nil filing still required)

Note: LLCs taxed as corporations must also file Form 1120.

Form 1120 Filing Due Date

  • Standard Due Date: April 15, 2025
  • If April 15 falls on a holiday/weekend, the next business day applies

Need More Time?

  • File IRS Tax Extension (Form 7004)
  • Extension grants 6 extra months
  • Tax payment (if any) must still be estimated and paid on time

Information Required to File Form 1120

To prepare Form 1120, the following details are needed:

  • Company incorporation details
  • EIN (Employer Identification Number)
  • Business income & expenses
  • Bank statements
  • Payroll details (if applicable)
  • Shareholder details
  • Previous year tax filings

Common Mistakes to Avoid

  • Missing the filing deadline
  • Assuming no revenue = no filing
  • Incorrect expense classification
  • Not reporting foreign-owned transactions
  • Ignoring state & franchise tax filings

Penalties for Late or Non-Filing

Failure to file Form 1120 can result in:

  • Monetary penalties
  • Interest on unpaid taxes
  • IRS notices & audits
  • Banking and compliance issues
  • Difficulty raising funds or closing accounts

Difference Between Form 1120 & Form 1120S

ParticularsForm 1120Form 1120S
Entity TypeC-CorporationS-Corporation
TaxationCorporate taxPass-through
ShareholdersUnlimitedMax 100
Foreign OwnersAllowedNot allowed

Do Indian Founders Need to File Form 1120?

Yes. If an Indian founder owns a US C-Corporation, Form 1120 filing is compulsory—regardless of where the owner resides or where operations are based.

State & Franchise Tax Compliance

Apart from federal filing, C-Corporations may also need to file:

  • State income tax returns
  • Franchise tax reports (e.g., Delaware Franchise Tax)

These filings vary by state and are mandatory.

How We Help with IRS Form 1120 Filing

We provide end-to-end US compliance support for Indian founders:

  • IRS Form 1120 preparation & filing
  • Tax extension (Form 7004)
  • State & franchise tax filing
  • Compliance for zero-revenue startups
  • Dedicated US tax experts

Pricing

  • Annual USA Compliance & Tax Filing: USD 499 (all-inclusive)

Get Compliant Before April 15

Already have a US C-Corporation? Ensure your 2025 IRS & state compliance is completed on time to avoid penalties.

Talk to our US compliance experts today and stay worry-free.

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