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Information about Form 1120, U.S. Corporation Income Tax Return, including recent updates, related forms and instructions on how to file. Use this form to report the income, gains, losses, deductions, credits, and to figure the income tax liability of a corporation.

Find out what takes place in the formation of a corporation and the resulting tax responsibilities and required forms.

Get a list of IRS forms for corporations.

Information about Form 8453-CORP, E-file Declaration for Corporations, including recent updates, related forms, and instructions on how to file. Form 8453-CORP is used to authenticate an electronic Form 1120, authorize an ERO or ISP to transmit via a third-party, and authorize a corporation's consent to direct deposit any refund or electronic funds withdrawal for payment of federal taxes owed.

Information about Form 1120-S, U.S. Income Tax Return for an S Corporation, including recent updates, related forms, and instructions on how to file. Form 1120-S is used by corporations that elect to be S corporations to report income, deductions, gains, losses, etc.

Information about Form 1120-X, Amended U.S. Corporation Income Tax Return, including recent updates, related forms, and instructions on how to file. Corporations use Form 1120-X to correct a previously filed Form 1120 or 1120-A or to make certain elections after the prescribed deadline.

Information about Form 2220, Underpayment of Estimated Tax By Corporations, including recent updates, related forms, and instructions on how to file. Form 2220 is used by corporations, certain tax-exempt organizations, and private foundations to determine whether they are subject to the penalty for underpayment of estimated tax, and if so, the amount of the penalty.

Form 2553 is used by qualifying small business corporations and limited liability companies to make the election prescribed by Sec. 1362. A corporation or other entity eligible to be treated as a corporation files this form to make an election under section 1362(a) to be an S corporation.

Information about Form 973, Corporation Claim for Deduction for Consent Dividends, including recent updates, related forms and instructions on how to file. Form 973 is used by corporations claiming a consent dividends deduction (accompanied by Form 972 consents by the shareholders) with their income tax returns.

The Inflation Reduction Act of 2022 established a stock repurchase excise tax under section 4501 equal to 1% of the fair market value (FMV) of stock repurchased during the tax year by certain publicly traded corporations or their specified affiliates, effective for repurchases occurring after 2022. Use Form 7208, Excise Tax on Repurchase of Corporate Stock, to figure the excise tax on stock repurchases.