<prompt> Human: Ive been using TurboTax since 2009, and also have been putting away money in a 401K just as long. TurboTax has always imported my W-2 from Ceridians website, and noticed it also imports the box where it states the amount of money I stashed away to a 401k for the year. I assumed, oh nice, turbo tax has this number and theres even a drop down menu that says its a 401k. Turbotax has got me.I want to punch 2009-me in the dick. I did not deduct any of my 401k contributions since then. I read that I can amend my taxes for up to 3 years, but is there anything else I can do to recoup the full amount that is owed? Looks like I can amend 2013, 2012, and 2011 returns. Im assuming I need to amend 2011 returns by April 15th so Ill do that first. Am I screwed for 2010 and 2009?Thanks!  <response>: Hi There! I dont expect that you should receive a deduction per se from your 401k - this amount is already reflected in your Box 1 wages - lets say you make 100,000 but paid 15,000 into your 401k - your box 1 should be 85,000.Unless youre talking about the Savers Credit, which started in 2012.And dont please dont punch 2009-you in the dick for messing up future taxes, you dont want to set up that precedent for dick-punching - taxes are only getting more complicated. 