So I was looking through my paystubs and realized I have paid a lot in taxes this year. I have a pension but have started to put money in a 401K. I am new to investing and have a few questions. My 401K isn't matched at all by my employer. Should I be maxing out my contibution pre tax and will that lower my tax liability? Also should I put money in after tax if I max out the $23K we can put in next year?