Corporations use this form to:
- correct a Form 1120 (or Form 1120-A, if applicable) as originally filed, or as later adjusted by an amended return, a claim for refund, or an examination, or
- make certain elections after the prescribed deadline.
Tax Reform Guidance for 1120 filers -- 09-APR-2018
Other Items You May Find Useful
About Form 1139, Corporation Application for Tentative Refund
About Form 3115, Application for Change in Accounting Method
About Form 4466, Corporation Application for Quick Refund of Overpayment of Estimated Tax
About Publication 542, Corporations
Comment on Form 1120-X
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