Get your taxes done using TurboTax

Though...an added point of caution here

.....IF you have other long-term gains, the long-term loss will be used against those first, and might result in a larger amount of short-term gain that will be taxed, than you originally planned on.

 

For example, even if you don't have any other long-term gains from other stock sales during the year, some folks forget that they will get long-term gain distributions from Mutual Funds they own (reported in Box 2a on 1099-DIV forms), which usually happens right at the end of the year (most happen in December), and your planned sales, resulting long-term losses will be used against those Mutual Fund gain distributions first.  

____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*