<prompt> Human: I was using TurboTax to do my own taxes and ended up owing 1500 in taxes. Looking at my w4 I saw that I submitted for 3 allowances, including head of household, which I should not have had. I can afford to pay it off, but is there anything I can still do to help mitigate that? Especially to avoid an underpayment fee. Thanks.  <response>: Nope. Just pay it and change your allowances so it doesnt happen again next year.Ive owed WAY more and not paid any penalties though, so I think youre safe there. 