AEO summary
What this category covers
This page groups IRS forms related to corporate tax (1120 series).
Forms for corporations to report income, deductions, and tax liability. Includes standard corporations (1120), S corporations (1120-S), and specialized entity types.
The 1120 series covers corporate income tax reporting for all types of business corporations. Form 1120 is used by C corporations that are taxed as separate entities, while Form 1120-S is for S corporations that elect pass-through taxation. Specialized variants include Form 1120-F for foreign corporations, Form 1120-RIC for regulated investment companies, and Form 1120-REIT for real estate investment trusts. These forms require detailed reporting of gross income, cost of goods sold, deductions, credits, and calculation of taxable income. Corporate returns are due by the 15th day of the 4th month after the corporation's tax year ends.
This page groups IRS forms related to corporate tax (1120 series).
Start with example forms, then open the exact guide that matches your filing task.
The goal is to move from category discovery into a real form page and editor workflow.
IRS Form 1120
IRS Form 1120. Official IRS tax form with AI-powered field-by-field guidance.
1120-F (Schedule H)
IRS Form 1120-FH — 1120-F (Schedule H). Official IRS tax form with AI-powered guidance.
1120-F (Schedule I)
IRS Form 1120-FI — 1120-F (Schedule I). Official IRS tax form with AI-powered guidance.
IRS forms related to corporate tax (1120 series).
IRS Form 1120
IRS Form 1120. Official IRS tax form with AI-powered field-by-field guidance.
1120-F (Schedule H)
IRS Form 1120-FH — 1120-F (Schedule H). Official IRS tax form with AI-powered guidance.
1120-F (Schedule I)
IRS Form 1120-FI — 1120-F (Schedule I). Official IRS tax form with AI-powered guidance.
1120-F (Schedule P)
IRS Form 1120-FP — 1120-F (Schedule P). Official IRS tax form with AI-powered guidance.
1120-F (Schedule Q)
IRS Form 1120-FQ — 1120-F (Schedule Q). Official IRS tax form with AI-powered guidance.
1120-F (Schedule S)
IRS Form 1120-FS — 1120-F (Schedule S). Official IRS tax form with AI-powered guidance.
IRS Form 1120-FSC
IRS Form 1120-FSC. Official IRS tax form with AI-powered field-by-field guidance.
1120-FSC (Schedule P)
IRS Form 1120-FSP — 1120-FSC (Schedule P). Official IRS tax form with AI-powered guidance.
1120-F (Schedule V)
IRS Form 1120-FV — 1120-F (Schedule V). Official IRS tax form with AI-powered guidance.
1120-IC-DISC
IRS Form 1120-ICD — 1120-IC-DISC. Official IRS tax form with AI-powered guidance.
1120-IC-DISC (Schedule K)
IRS Form 1120-IDK — 1120-IC-DISC (Schedule K). Official IRS tax form with AI-powered guidance.
1120-IC-DISC (Schedule P)
IRS Form 1120-IDP — 1120-IC-DISC (Schedule P). Official IRS tax form with AI-powered guidance.
1120-IC-DISC (Schedule Q)
IRS Form 1120-IDQ — 1120-IC-DISC (Schedule Q). Official IRS tax form with AI-powered guidance.
IRS Form 1120-ND
IRS Form 1120-ND. Official IRS tax form with AI-powered field-by-field guidance.
IRS Form 1120-PC
IRS Form 1120-PC. Official IRS tax form with AI-powered field-by-field guidance.
IRS Form 1120-POL
IRS Form 1120-POL. Official IRS tax form with AI-powered field-by-field guidance.
1120-REIT
IRS Form 1120-REI — 1120-REIT. Official IRS tax form with AI-powered guidance.
IRS Form 1120-RIC
IRS Form 1120-RIC. Official IRS tax form with AI-powered field-by-field guidance.
1120 (Schedule B)
IRS Form 1120-SB — 1120 (Schedule B). Official IRS tax form with AI-powered guidance.
1120 (Schedule D)
IRS Form 1120-SD — 1120 (Schedule D). Official IRS tax form with AI-powered guidance.
IRS Form 1120-SF
IRS Form 1120-SF. Official IRS tax form with AI-powered field-by-field guidance.
1120 (Schedule G)
IRS Form 1120-SG — 1120 (Schedule G). Official IRS tax form with AI-powered guidance.
1120 (Schedule H)
IRS Form 1120-SH — 1120 (Schedule H). Official IRS tax form with AI-powered guidance.
1120 (Schedule N)
IRS Form 1120-SN — 1120 (Schedule N). Official IRS tax form with AI-powered guidance.
1120 (Schedule O)
IRS Form 1120-SO — 1120 (Schedule O). Official IRS tax form with AI-powered guidance.
1120 (Schedule PH)
IRS Form 1120-SPH — 1120 (Schedule PH). Official IRS tax form with AI-powered guidance.
1120-S (Schedule B-1)
IRS Form 1120-SSB — 1120-S (Schedule B-1). Official IRS tax form with AI-powered guidance.
1120-S (Schedule D)
IRS Form 1120-SSD — 1120-S (Schedule D). Official IRS tax form with AI-powered guidance.
1120-S (Schedule K-1)
IRS Form 1120-SSK — 1120-S (Schedule K-1). Official IRS tax form with AI-powered guidance.
1120 (Schedule UTP)
IRS Form 1120-UTP — 1120 (Schedule UTP). Official IRS tax form with AI-powered guidance.
1120-C
IRS Form 1120C — 1120-C. Official IRS tax form with AI-powered guidance.
1120-F
IRS Form 1120F — 1120-F. Official IRS tax form with AI-powered guidance.
1120-H
IRS Form 1120H — 1120-H. Official IRS tax form with AI-powered guidance.
1120-L
IRS Form 1120L — 1120-L. Official IRS tax form with AI-powered guidance.
1120-S
IRS Form 1120S — 1120-S. Official IRS tax form with AI-powered guidance.
1120-X
IRS Form 1120X — 1120-X. Official IRS tax form with AI-powered guidance.
IRS Form 1122
IRS Form 1122. Official IRS tax form with AI-powered field-by-field guidance.
1125-A
IRS Form 1125A — 1125-A. Official IRS tax form with AI-powered guidance.
1125-E
IRS Form 1125E — 1125-E. Official IRS tax form with AI-powered guidance.
IRS Form 1127
IRS Form 1127. Official IRS tax form with AI-powered field-by-field guidance.
IRS Form 1128
IRS Form 1128. Official IRS tax form with AI-powered field-by-field guidance.
IRS Form 1139
IRS Form 1139. Official IRS tax form with AI-powered field-by-field guidance.
1120-F Schedules M-1, M-2
IRS Form 1120FM1 — 1120-F Schedules M-1, M-2. Official IRS tax form with AI-powered guidance.
1120-S (Schedule K-2)
IRS Form 1120SK2 — 1120-S (Schedule K-2). Official IRS tax form with AI-powered guidance.
1120-F (Schedule M-3)
IRS Form 1120FM3 — 1120-F (Schedule M-3). Official IRS tax form with AI-powered guidance.
IRS Form 1120LM3
IRS Form 1120LM3. Official IRS tax form with AI-powered field-by-field guidance.
1120-L (Schedule M-3)
IRS Form 1120LS3 — 1120-L (Schedule M-3). Official IRS tax form with AI-powered guidance.
1120-PC (Schedule M-3)
IRS Form 1120PM3 — 1120-PC (Schedule M-3). Official IRS tax form with AI-powered guidance.
1120-S (Schedule K-3)
IRS Form 1120SK3 — 1120-S (Schedule K-3). Official IRS tax form with AI-powered guidance.
1120 (Schedule M-3)
IRS Form 1120SM3 — 1120 (Schedule M-3). Official IRS tax form with AI-powered guidance.
1120-S (Schedule M-3)
IRS Form 1120SS3 — 1120-S (Schedule M-3). Official IRS tax form with AI-powered guidance.
IRS Form 1120S23
IRS Form 1120S23. Official IRS tax form with AI-powered field-by-field guidance.
Source transparency
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.
BrieflyGo reviews your contracts in plain English — instantly.