C-Corporation Tax Forms

If your web business is a C-Corporation use the forms below to file taxes with the IRS:

If you are a C corporation you may be liable for… Use Form… Separate Instructions…
Income Tax 1120, U.S. Corporation Income Tax Return (PDF) Instructions for Form 1120 U.S. Corporation Income Tax Return (PDF)
Estimated tax 1120-W, Estimated Tax for Corporations (PDF) Instructions for Form 1120-W (PDF)
Employment taxes: 

  • Social security and Medicare taxes and income tax withholding
  • Federal unemployment (FUTA) tax
941, Employer’s Quarterly Federal Tax Return (PDF) or 943, Employer’s Annual Federal Tax Return for Agricultural Employees (PDF) (for farm employees) 

940, Employer’s Annual Federal Unemployment (FUTA) Tax return (PDF)

Instructions for Form 941 (PDF) 

Instructions for Form 943 (PDF)

Instructions for Form 940 (PDF)

Excise Taxes Refer to the Excise Tax Web page

Make sure to read our C-Corporation pages for additional information. You may not need to fill out ALL the forms above – make sure to read the IRS instructions for each form before filling it out.

Further Reading:

IRS C Corporation Tax Forms

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