No. If you didn't specify LIFO on account or sell by specifying the shares you wish sold, then the brokers method applies. From [Publication 551][1] > Identifying stock or bonds sold. If you can adequately identify the > shares of stock or the bonds you sold, their basis is the cost or > other basis of the particular shares of stock or bonds. If you buy and > sell securities at various times in varying quantities and you cannot > adequately identify the shares you sell, the basis of the securities > you sell is the basis of the securities you acquired first. For more > information about identifying securities you sell, see Stocks and > Bonds under Basis of Investment Property in chapter 4 of Pub. 550. The trick is to identify the stock lot prior to sale. [1]: https://www.irs.gov/publications/p551/ar02.html#en_US_201612_publink1000256905