March 15 – Deadline for calendar-year corporations to elect S corporation status for 2007.
March 15 – Deadline for filing 2006 tax returns for calendar-year corporations.
April 2 – Deadline for taking your first distribution from regular IRAs if you turned 70- 1/2 in 2006. Unless you’re still working, this deadline also applies to your other retirement accounts (except for Roth IRAs).
April 17 – Deadline for filing 2006 individual tax returns.
April 17 – Deadline for filing 2006 partnership returns.
April 17 – Deadline for filing 2006 gift tax returns.
April 17 – Deadline for making your 2006 IRA contribution.
April 17 – First installment of 2007 individual estimated tax is due.
June 15 – Second installment of 2007 individual estimated tax is due.