<prompt> Human: I am in somewhat of a unique situation and hoping someone can help. I recently got married to my lovely wife 6 months ago. I am not a very showy or flashy person and would have preferred a small, cheap ceremony, but everyone knows how that one goes. The wedding was quite extravagant and ended up costing 300,000. The wedding ended up being amazing though the cost of the wedding was a point of contention for months leading up to it and remains a touchy subject. My wife comes from a well off family and paid for almost the entire wedding. My wife is extremely hands off about money and has no idea how much she has. When Ive tried to inquire she doesnt know how to even find out and her family is somewhat secretive about it. My father in law recently told us to be ready for a 10k tax bill this year so I asked further and found out the wedding was financed by my wife selling off hundreds of thousands of dollars of stock. I had asked her whether we were spending her money or her parents money and she said her parents she left out or didnt know it was in her name. What freaked me out is when I asked her how much she sold said she didnt know, but could be 2 or 300,000 of stock 15 is 45k, almost half our combined salaryMy in laws previously had encouraged my wife not to even tell me that she even had a trust fundmoney in her name which wasnt exactly difficult for me to get out of her. My FIL wants us to use his accountant to just take care of it, when I asked him how much his accountant would cost he said hes not sure since hes never asked. I trust my wife dearly, she has always let her father take care of all her finances, which I just feel extremely uncomfortable doing.Does anyone know the easiest way to predict capital gains tax? And whether any was withheld? Is there a form I can have her get from her financial advisor? I am obviously way over my head given the complexity and how in the dark I am about her financial situation. Thanks!Assistant: Taxes are not withheld on capital gains. You would typically owe 15 on gains which is not gross proceeds, but rather proceeds - cost basis, though it you had a lot of gains 200K, you would owe additional taxes on top of those, up to about 20ish. So, just as a ballpark guessimate, if you sold 300,000 of stock and half of that was gains which it might or might not be, youd have 150K of gains and owe 22.5K in taxes, none of which would have been withheld. You want to make an estimated tax payment before January 15th if the gains are in that ballpark at your current salary.Human: Do you know if there is a form or report I can ask for from the financial advisor to find out gains? Its A boutique advisor so I am very unfamiliar with how these things work  <response>: You could ask to see the trade confirmations for the asset sales. Those would also list the cost basis if the assets were acquired in the last few years, so you could calculate the gains. If the confirmations dont show gains, you would have to ask what the cost basis was from other records. 