Tax calendar

April 18 — Besides being the last day to file (or extend) your 2015 personal return and pay any tax that is due, 2016 first quarter estimated tax payments for individuals, trusts, and calendar-year corporations are due today. So are 2015 returns for trusts and calendar-year estates, partnerships, and LLCs, plus any final contribution you plan to make to an IRA or Education Savings Account for 2015. SEP and Keogh contributions are also due today if your return is not being extended.

June 15 — Second quarter estimated tax payments for individuals, trusts, and calendar-year corporations are due today.