<prompt> Human: So I got married this year, and am filling out a new W4, and it seems like Im supposed to pay a lot more attention to things now that my marital status has changed. Both my spouse and I work full time. Weve checked the Married box for marital status we werent sure that the withholding at the higher single rate was the right thing to do. We plan to file taxes jointly.For completeness, well say that my income is 100K per year, and my wifes is 45K per year these arent exact, but Id like to stay somewhat anonymous : So we worked through the Two Earners worksheet, and the result tells us to put -0- in the total allowances field line 5, and a sum of just under 200 in the additional withholding box line 6.My question here is now, do both my wife and I claim zero, and withhold the extra amount? Should either of us claim any allowances we have no children, so this would likely be 1 or 2? Is the additional withholding amount something we should split between the two of us, or should we each be taking that amount out of both of our respective paychecks?Needless to say, Im very confused -- anything should help, and thanks for taking the time to read.Assistant: Hi OP! Im 99 sure of this: You should both claim 0, and you should have the 200 per paycheck withheld however you please between both of your paychecks. You could have the 200 withheld all from yours, 200 withheld all from hers, or 100 withheld from each for example.This is the exact same thing a single person would do if they held two jobs, if that helps you think about it.Human: That does clarify things a bit, thank you! Ill probably be nice and take the additional out of my check due to the disparity between our incomes :  <response>: The W4 instructions for dual income married people are confusing as they seem to imply that both people should calculate the additional withholding because each person is filling out a separate W4 for each job, but Im fairly sure that uwelliamwallace is correct that the additional withholding only needs to be calculated once and then can be spread across each persons paychecks as you wish.The easiest way to make sure that youre doing it right is to calculate your tax bill for the entire year based on your projected income e.g., and then use a paycheck calculator to see what your withholdings will be, based on the numbers you put into the W4 e.g., If they are close to each other, youre good. If not, then adjust the W4 numbers so that the withholding approximates your estimated taxes. 