Form 1120: U.S. Corporation Income Tax Return
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IRS Form 1120, U.S. Corporation Income Tax Return, is the 6-page annual federal tax return domestic C corporations and LLCs taxed as corporations file to report gross income, business deductions, corporate tax computation on Schedule J, and balance sheets on Schedule L. Calendar-year returns are due April 15. Open Form 1120 in JustFill to complete all 6 pages online.
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Shared fields: Contractor Name, Address, TIN, Payer Details, Box 1a Compensation
IRS Form W-4 + USCIS Form I-9
IRS Form W-9 + IRS Form 1099-NEC (Copy B)
IRS Form 2848 (POA) + Form 8821 + Form 4506-T Transcript
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Form 1120 is the 6-page annual federal income tax return filed by domestic corporations — including LLCs that have elected to be taxed as C corporations via Form 8832 — to report income, gains, losses, deductions, credits, and to figure their federal income tax liability at the 21% corporate tax rate under IRC Section 11. Across its 6 pages, Form 1120 includes Page 1 (Gross income, Deductions, Taxable income, Tax, and Payments), Page 2 (Schedule C Dividends, Inclusions, and Special Deductions), Page 3 (Schedule J Tax Computation and Payment), Pages 4–5 (Schedule K Other Information compliance questions), and Page 6 (Schedule L Balance Sheets per Books, Schedule M-1 Reconciliation of Income per Books With Income per Return, and Schedule M-2 Analysis of Unappropriated Retained Earnings per Books). Upload the official 6-page IRS Form 1120 PDF in JustFill to complete every schedule in your browser.
The official 6-page IRS Form 1120 PDF is free to download in the public domain at irs.gov/forms-pubs/about-form-1120. Open the blank Form 1120 PDF in JustFill to complete Page 1 and Schedules C, J, K, L, M-1, and M-2 online and download a print-ready copy.
What each section of Form 1120 asks for. JustFill’s AI will detect these fields automatically when you upload the PDF — review the breakdown below so you know what to enter.
Corporation name, address, EIN, date incorporated, total assets, gross receipts or sales less returns and allowances, cost of goods sold (attach Form 1125-A), dividends (from Schedule C), interest, gross rents and royalties, capital gain net income (attach Schedule D), and total income on Line 11.
Compensation of officers (attach Form 1125-E if total receipts are $500,000 or more), salaries and wages, repairs, bad debts, rents, taxes and licenses, interest, charitable contributions (10% taxable-income limit), depreciation (Form 4562), net operating loss deduction (Line 29a), special deductions (Line 29b), taxable income (Line 30), total tax from Schedule J (Line 31), estimated tax payments (Line 33), and amount owed or overpayment.
Domestic and foreign dividends received and the corresponding Dividends-Received Deduction (DRD) percentages (50%, 65%, or 100%) that flow to Page 1Lines 4 and 29b.
Part I computes the 21% corporate income tax, alternative minimum tax for applicable corporations (Form 4626), base erosion minimum tax (Form 8991), general business credit (Form 3800), and foreign tax credit (Form 1118); Part III details refundable credits and estimated tax payments.
Accounting method, NAICS business activity code, 20%-or-more parent corporations or 50%-or-more individual shareholders (Schedules G), foreign shareholding disclosures (requiring Form 5472 for 25%-foreign-owned domestic corporations), net operating loss carryforwards, and Question 13 small-corporation exemption from Schedules L, M-1, and M-2.
Beginning and ending corporate balance sheets per books (assets, liabilities, and shareholders' equity), Schedule M-1 reconciliation of book net income with Line 28 taxable income before NOL and special deductions, and Schedule M-2 analysis of unappropriated retained earnings.
A domestic software C corporation in Raleigh, NC files its 6-page Form 1120 reporting $950,000 in gross receipts, $750,000 in total deductions, $200,000 in taxable income, and $42,000 in federal corporate income tax at the 21% rate. All names and numbers are fictional.
Sample Apex Cloud Corp. · EIN: 98-•••6104 · 500 Sample Fayetteville St, Ste 900, Raleigh, NC 27601 · Item C Date Incorporated: 02/14/2022 · Item D Total Assets: $410,000
Identifies the domestic C corporation, incorporation date, and ending book assets.
Line 1a Gross receipts: $950,000 · Line 11 Total income: $950,000 · Line 27 Total deductions: $750,000 · Line 30 Taxable income: $200,000 · Line 31 Total tax: $42,000 · Line 33 Estimated tax payments: $42,000
Computes taxable corporate income ($200,000) and applies the 21% flat corporate tax rate ($42,000) offset by quarterly estimated payments.
Schedule J Line 1 Income tax: $42,000 · Schedule K Line 1 Check accounting method: ☑ Accrual · Line 2a Business activity code: 511210 · Line 13 Receipts/assets under $250k: ☑ No
Reports accrual accounting, software publisher NAICS code 511210, and indicates Schedules L, M-1, and M-2 are completed on Page 6.
Schedule L Line 15 Ending Total Assets: $410,000 · Schedule M-1 Line 1 Net income per books: $158,000 + Line 2 Federal income tax per books: $42,000 = Line 10 Income on Page 1 Line 28: $200,000 · Signed by President Sarah K. Sample on 04/10/2026
Reconciles after-tax book net income ($158,000) with pre-tax federal taxable income ($200,000) on Schedule M-1.
These values are made up. They are here to show what belongs on each line, not to be copied — every name, number, and address on your own Form 1120 has to be your own.
Corporations that file 10 or more returns of any type during the calendar year are required to e-file Form 1120. Eligible paper filers mail Form 1120 to the IRS Service Center based on the corporation's principal business location and total assets.
Use this if the address is in: Corporations located in CT, DE, DC, GA, IL, IN, KY, ME, MD, MA, MI, NH, NJ, NY, NC, OH, PA, RI, SC, TN, VT, VA, WV, or WI with total assets under $10 million
Use this if the address is in: Corporations located in AL, AK, AZ, AR, CA, CO, FL, HI, ID, IA, KS, LA, MN, MS, MO, MT, NE, NV, NM, ND, OK, OR, SD, TX, UT, WA, WY, or any state with total assets of $10 million or more
A calendar-year C corporation must file Form 1120 by April 15 (the 15th day of the 4th month after the end of its tax year) or file Form 7004 by that date for an automatic 6-month extension to October 15.
Checked against the official Internal Revenue Service (IRS) instructions on 2026-10-23. Destinations change — confirm on the Internal Revenue Service (IRS) page before you send anything.
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Form 1120-S: U.S. Income Tax Return for an S Corporation
Form 7004: Application for Automatic Extension of Time To File Certain Business Income Tax Returns
Form 8832: Entity Classification Election
Form 2553: Election by a Small Business Corporation
Form SS-4, Application for Employer Identification Number (EIN)
Form W-9: Request for Taxpayer Identification Number and Certification
Form 1065: U.S. Return of Partnership Income
Form 3115: Application for Change in Accounting Method
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Official source: Form 1120 on Internal Revenue Service (IRS)’s website
Edition checked: 2025 Form 1120 (6 pages; OMB No. 1545-0123). Verified against the official source on · Verified in our Government Forms Fillability Study.
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