Partnerships, S and C Corps tax returns due dates have changed; the new due dates apply for tax years beginning after Dec. 31, 2015.
For calendar year, partnership & S Corp, the new due date is March 15, the 15th day of the third month following the close of the fiscal year (instead of the fourth month).
Generally, for C corporations, the new due date is the 15th day of the fourth month following the close of the corporation’s year. (These returns were due before on the 15th day of the third month).
Corporations will be allowed a six-month extension, except that calendar-year corporations would get a five-month extension until 2026 and corporations with a June 30 year end would get a seven-month extension until 2026.
However, for C corporations with fiscal years ending on June 30, the new due dates will not apply until tax years beginning after Dec. 31, 2025.
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