No. The deadline for 2012 contributions was April 15, 2013, regardless of filing extensions. However, you can make a 2013 contribution now; you don’t have to wait until the end of the year or even up to April 15, 2014, to do so. The sooner you make the contribution, the sooner you begin to accrue potentially tax-free income.
A credit for income taxes paid to a foreign country or U.S. possession. 401(k) plan. A deferred pay plan, authorized by Section 401(k) of the Internal Revenue Code, under which a percentage of an employee’s salary is withheld and placed in a savings account or the company’s profit-sharing plan. Income accumulates on the deferred amount until withdrawn by the employee at age 59?