Form 1120-X

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Form 1120-X

A form that one files with the IRS to amend a previously filed Form 1120, which is a corporate tax return.
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Net operating losses carried back to Tax Year 2010 from 2011 and beyond, and reported on Forms 1120X and 1139, are not included in the statistics shown in this article.
Exhibit: Differences between Forms 1120X or 1040X and Forms 1139 or 1045 Form 1120X or Form 1139 or 1040X 1045 Due date for filing Form must be Form must be filed within the filed within the normal rules for end of the loss the statute of year (e.g., limitation on December 31, refund claims 2010, for a 2009 (i.e., the later calendar-year of three years taxpayer).
In early January, the IRS's Large and Mid-Size Business Division requested Tax Executives Institute's comments on a proposal to centralize the processing of research tax credit claims in a single location (the Ogden Service Center) and possibly to require the filing of formal claims for refund (Forms 1120X) to effect a claim, rather than permitting an informal claim to be made during the course of the examination.
Note: Although Brookshire did not file Form 3115, it did attach the ISP paper to its 1993, 1994 and 1995 Forms 1120X, along with the explanation that "[t]he determination was made that gas station convenience stores should be reclassed from 31.5-and 39-year property to 15-year property based on the attached memo," referencing the ISP paper.