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Estimated taxes are due quarterly on specific dates during the year. The IRS mandates that the normal due dates for estimated taxes are April 15 for the first quarter of a year, June 15 for the second quarter, Sept. 15 for the third quarter and Jan.15 of the following year for the fourth quarter. Related Reading: How to Print Quarterly Taxes in QuickBooks.
When to Pay Estimated Tax. Estimated tax payments are due by the 15th day of the 4th, 6th, 9th and 12th months of the corporation's tax year. If the due date falls on a weekend or a legal holiday, the payment is due on the next regular business day.Example 1 - Calendar Year: If the corporation's tax year ends on December 31, the estimated tax payments are due on April 15, June 15, September 15, and December 15.f the due date falls on a weekend or a legal holiday, the payment is due on the next regular business day. Example 1 - Calendar Year: If the corporation's tax year ends on December 31, the estimated tax payments are due on April 15, June 15, September 15, and December 15.