<prompt> Human: Curious on why we owe so much back on taxes, below is info needed.Live in california MarriedBoth work, I make 45k and she makes 34kRent apartment File jointly2 kids under 6Paid 21k in daycareBoth have 2 exemptions on w4 which may be the problem...any help or ideas please  <response>: My guess is that you both also selected the Married designation on your W-4s. Dual earning couples are generally best served by selecting Married, but withhold at higher Single rate. That will mean more is withheld per paycheck and should prevent you from owing next year. 