<prompt> Human: Heres the rundown:Salary at present job around 70k. Wife around 40k. Just acquired second job that will be paying 8kyear. Its techinically a salaried position so it is subject to normal taxes i.e. no contracting, self-employed, etc. One issue I am dealing with is that the biweekly checks from this are so small they are not taking out any federal tax they are taking out FICA, SS, and State.What I want to do is take that entire 8k and remove it from my taxable income. I am not maxing my 401k yet but will in some form or fashion within the year expected year end bonus will go all into 401k and should come close to maxing it with my current deferral 3 match 100 up to 3. Likewise with an IRA. This 8k will go to helping towards one of those goals. I see a couple options but want input on what I am missing.Option 1: Up my deferral from salary to my company 401k by 8kyear thereby reducing my salary by 8k and filling in the gap with this new income. One concern here is how the lack of federal taxed being taken out of the 8k will come into play when my base income is reduced by 8k and subsequently the taxes on that base are reduced proportionally. The other concern is that my bonus puts be over the 17,500 limit and then I am taxed at bonus rates on the excess of the bonus that is paid out because it cant be put into the 401k which Id like to avoid, but such is life.Option 2: Work out some system with the second employer where the entire pre-tax amount is deposited into an IRA up to the 5500 max. They have a retirement plan but it is quite shitty. In this scenario, I am left with 2500 of taxable income that I cant put into an IRA. Option 3: I could, I guess, throw the entire amount into their retirement plan and then roll it over into my base companys 401k. One problem with putting it into their retirement plan is I think that amount would count against my 17,500 yearly limit and I am back at option 1square 1 anyway. However, it might be simpler to have the entire 8k just put into their retirment plan and then rolled over rather than allocate from option 1 and worry about tax implications on this new 8k.Option 4: You tell me.TL;DR: Have an extra 8k income from second job that I want to completely tax shelter. How should I do it.  <response>: Easy option to deal with getting the correct tax withholding is to file a new W-4 with each employer so that they withhold the proper amount of federal taxes.I think increasing your 401k contributions is a good idea on top of that, but its really a separate issue from the improper withholding you are trying to solve. 