Business tax deadline 2021: When is the tax deadline for ...
Apr 28, 2021 · April 15, 2021, if your corporation operates on a calendar year. October 15, 2021, if you decide to use the extended deadline. If your corporation operates on a fiscal year, your tax deadline is the 15th day of the fourth month following the end of your fiscal year. In all cases, file IRS Form 1120.
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