Final answer:
Corporate estimated tax payments are due on specific months of the year to prepay a corporation's expected tax liability.
Step-by-step explanation:
Corporate estimated tax payments are due on the 15th day of the 4th, 6th, 9th, and 12th months of the year. These payments are made by corporations to the Internal Revenue Service (IRS) on a quarterly basis to prepay their expected tax liability. By making estimated tax payments, corporations avoid penalties and interest for underpayment of taxes.