<prompt> Human: I never signed up for any 401k and yet since January 1st, a piece of my check had been deducted towards my 401k.I am pretty confused and annoyed right now. I work the night shift currently and plan on contacting HR.  <response>: A lot of companiesincluding the one I work for have a policy in place where they will automatically begin deducting a 401k if you do not specifically tell them otherwise. 