<prompt> Human: I got married last month and need to update our wittholding so the right amount of taxes are taken out of our paychecks. I have a couple questions about filling out the form:1. I contribute money to a 401k and my employer matches that. The form asks how much money I expect to contribute to my 401k. Do I put only the amount I contribute or the sum of my contribution and my expected employers contribution?2. My wife is a teacher who pays into pension plans. She does not have a 401k. Does she need to report contributions to her pension plan?  <response>: 1. Only what you will contribute, because that is what will affect your tax rate i.e. lower the amount you are paying taxes on each pay period.2. That will happen on the tax return. If it comes out pre-tax, put it onto the form to help calculate what you will pay.Use the IRS calculator to get a good estimate of what your tax liability will be. 