Individuals: Pay the second installment of estimated tax for 2013.
Corporations: Deposit the second installment of your 2013 estimated tax. Note: This due date is based on Calendar Year Taxpayers. If you are a Fiscal Year Taxpayer, you should calculate your quarterly due dates based on your fiscal year end date. Estimated tax payment due dates are the 15th day of the 4th, 6th, 9th, and 12th months of the corporate tax year.