S Corporation Tax Forms

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

Chart 1 – S Corporation
If you are an S corporation then you may be liable for… Use Form… Separate Instructions…
Income Tax 1120S (PDF)
1120S Sch. K-1 (PDF)
Instructions for Form 1120S (PDF)
Instructions for Form 1120S Sch. K-1 (PDF)
Estimated tax 1120-W (PDF) (corporation only) and 8109 Instructions for Form 1120-W (PDF)
Employment taxes: 

  • Social security and Medicare taxes and income tax withholding
  • Federal unemployment (FUTA) tax
  • Depositing employment taxes
941 (PDF) ( 943 (PDF) for farm employees) 

940 (PDF)
8109

Instructions for Form 941 Employers QUARTERLY Federal Tax Return (PDF) 

Instructions for Form 943 Employers Annual Federal Tax Return for Agricultural Employees (PDF)

Instructions for Form 940 Employers Annual Federal Unemployment (FUTA) Tax Return (PDF)

Excise Taxes Refer to the Excise Tax web page
Chart 2 – S Corporation Shareholders
If you are an S corporation
shareholder then you may be liable for…
Use Form… Separate Instructions…
Income Tax 1040 and Schedule E (PDF) Instructions for Schedule E (Form 1040)Supplemental Income and Loss (PDF)
Estimated tax 1040-ES (PDF)

Make sure to read our S-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 S Corporation Tax Forms

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